AVAV

Line plots across dimensions of each concept
Line plots across concepts
Tables

Plots across concepts

IncomeStatement

Expenses

Balance Sheet

Assets

Current Assets

NonCurrent Assets

Liabilities

Current Liabilities

Stockholders Equity

CashFlow

NetCashProvidedByUsedInOperatingActivities

NetCashProvidedByUsedInInvestingActivities

OperatingLeaseLiability

LesseeOperatingLeaseLiabilityPaymentsDue

InventoryNet

AccountsReceivable

Tables

		2020-10-31	2020-08-01	2020-01-25	2019-10-26	2019-07-27	2019-01-26	2018-10-27	2018-07-28	2018-04-30	2018-01-27	2017-10-28	2017-07-29	2017-04-30	2017-01-28	2016-10-29	2016-07-30	2016-04-30	2016-01-30	2015-10-31	2015-08-01	2015-04-30	2015-01-31	2014-11-01	2014-08-02	2014-04-30	2014-01-25	2013-10-26	2013-07-27	2013-04-30	2013-01-26	2012-10-27	2012-07-28	2012-04-30	2012-01-28	2011-10-29	2011-07-30	2011-04-30	2011-01-29	2010-10-30	2010-07-31
us-gaap:SharesIssued us-gaap:StatementEquityComponents us-gaap:CommonStock		NA	NA	23.995109	23.990616	23.990459	23.93246	23.928373	23.923342	23.908736	NA	NA	NA	23.630419	NA	NA	NA	23.359925	NA	NA	NA	23.31464	NA	NA	NA	23.176576	NA	NA	NA	22.614315	NA	NA	NA	22.243903	NA	NA	NA	21.949884	NA	NA	NA
us-gaap:CommonStockSharesIssued		NA	NA	23.995109	23.990616	23.990459	23.93246	23.928373	23.923342	23.908736	23.906043	23.865335	23.8403	23.630419	23.456561	23.371943	23.39503	23.359925	23.358981	23.318688	23.53066	23.31464	23.319876	23.324276	23.356556	23.176576	22.76582	22.704189	22.672762	22.614315	22.417427	22.417977	22.262506	22.243903	22.146714	22.098896	22.094291	21.949884	NA	NA	NA
us-gaap:CommonStockSharesOutstanding		NA	NA	23.995109	23.990616	23.990459	23.93246	23.928373	23.923342	23.908736	23.906043	23.865335	23.8403	23.630419	23.456561	23.371943	23.39503	23.359925	23.358981	23.318688	23.53066	23.31464	23.319876	23.324276	23.356556	23.176576	22.76582	22.704189	22.672762	22.614315	22.417427	22.417977	22.262506	22.243903	22.146714	22.098896	22.094291	21.949884	NA	NA	NA
us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding	██▁▅▆▆▆▅	24.196912	24.186228	23.821145	24.06181	24.069933	24.081819	24.098833	24.010303	NA	23.515622	23.832959	23.336305	NA	23.082974	23.049056	22.956607	NA	23.083816	23.148456	22.947487	NA	23.109354	22.87841	22.804127	NA	22.883583	22.69759	22.238363	NA	22.408377	22.383791	21.929455	NA	22.317015	22.255943	22.238117	NA	22.096989	22.027155	21.54587
us-gaap:WeightedAverageNumberOfSharesOutstandingBasic	█▇▆▅▄▃▃▁	23.93695	23.893001	23.821145	23.804364	23.745199	23.687672	23.6674	23.574595	NA	23.515622	23.477914	23.336305	NA	23.082974	23.049056	22.956607	NA	22.890484	22.985956	22.947487	NA	22.890502	22.87841	22.804127	NA	22.321368	22.273629	22.238363	NA	22.142917	22.03033	21.929455	NA	21.797802	21.763927	21.724053	NA	21.594032	21.565969	21.54587
us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	▁▁█▁▁▁▁▂	2.3e-05	0.000844	0.287408	0.008402	0.003675	0.001705	0.000598	0.025392	NA	0.379749	0.0	0.256011	NA	0.222071	0.199428	0.302332	NA	0.009	0.021	0.0	NA	0.011	0.0	0.0	NA	0.024	0.029	0.085	NA	0.006	0.01	0.007	NA	0.022	0.001	NA	NA	NA	NA	NA
us-gaap:EarningsPerShareBasic	▃▅▃▄▆▄▄▇▆▃▄▂█▃▂▁▄▄▄▂▄▃▂▂▄▅▃▂▃▄▄▃▆▄▄▃▆▅▃▂	0.09	0.42	-0.04	0.32	0.72	0.35	0.26	1.16	0.79	-0.04	0.3	-0.19	1.32	-0.09	-0.18	-0.51	0.23	0.27	0.19	-0.3	0.31	0.1	-0.13	-0.16	0.36	0.5	0.07	-0.32	-0.04	0.17	0.4	-0.06	0.81	0.26	0.3	0.02	0.82	0.53	0.01	-0.16
us-gaap:EarningsPerShareDiluted	▃▅▃▄▆▄▄▇▆▃▄▂█▃▂▁▄▄▄▂▄▃▂▂▄▅▃▂▃▄▄▃▆▄▄▃▆▅▃▂	0.09	0.42	-0.04	0.31	0.71	0.35	0.25	1.14	0.77	-0.04	0.29	-0.19	1.3	-0.09	-0.18	-0.51	0.23	0.27	0.19	-0.3	0.31	0.1	-0.13	-0.16	0.35	0.49	0.07	-0.32	-0.04	0.17	0.39	-0.06	0.8	0.26	0.3	0.01	0.7899999999999999	0.52	0.01	-0.16
us-gaap:IncomeLossFromContinuingOperationsPerBasicShare		NA	NA	-4e-08	3.2e-07	7.2e-07	3.5e-07	3e-07	8.6e-07	8.6e-07	-5.0000000000000004e-08	2.9e-07	-1.4e-07	1.23e-06	-3e-08	-1.1e-07	-3.7e-07	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA
us-gaap:IncomeLossFromContinuingOperationsPerDilutedShare		NA	NA	-4e-08	3.1e-07	7.1e-07	3.5e-07	2.9e-07	8.5e-07	8.5e-07	-5.0000000000000004e-08	2.8e-07	-1.4e-07	1.21e-06	-3e-08	-1.1e-07	-3.7e-07	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA

		2020-10-31	2020-08-01	2020-01-25	2019-10-26	2019-07-27	2019-01-26	2018-10-27	2018-07-28	2018-04-30	2018-01-27	2017-10-28	2017-07-29	2017-04-30	2017-01-28	2016-10-29	2016-07-30	2016-04-30	2016-01-30	2015-10-31	2015-08-01	2015-04-30	2015-01-31	2014-11-01	2014-08-02	2014-04-30	2014-01-25	2013-10-26	2013-07-27	2013-04-30	2013-01-26	2012-10-27	2012-07-28	2012-04-30	2012-01-28	2011-10-29	2011-07-30	2011-04-30	2011-01-29	2010-10-30	2010-07-31
COGS Ratio us-gaap:ProductOrService us-gaap:Product	▆▅▃▅▆▄▄▅█▃▄▁	65.528	58.357	36.432	57.386	65.839	50.024	47.056	55.313	85.065	39.447	48.42	18.78	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA
COGS Ratio us-gaap:ProductOrService us-gaap:Service	▇█▆▆▄▆▆▅█▁▂	27.137	29.093	25.459	25.885	21.072	25.298	25.923	22.73	28.564	15.186	17.381	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA
Gross Margin us-gaap:ProductOrService us-gaap:Product	▆▅▃▅▆▄▄▅█▃▄▁	65.528	58.357	36.432	57.386	65.839	50.024	47.056	55.313	85.065	39.447	48.42	18.78	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA
Gross Margin us-gaap:ProductOrService us-gaap:Service	▇█▆▆▄▆▆▅█▁▂	27.137	29.093	25.459	25.885	21.072	25.298	25.923	22.73	28.564	15.186	17.381	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA

		2020-10-31	2020-08-01	2020-01-25	2019-10-26	2019-07-27	2019-01-26	2018-10-27	2018-07-28	2018-04-30	2018-01-27	2017-10-28	2017-07-29	2017-04-30	2017-01-28	2016-10-29	2016-07-30	2016-04-30	2016-01-30	2015-10-31	2015-08-01	2015-04-30	2015-01-31	2014-11-01	2014-08-02	2014-04-30	2014-01-25	2013-10-26	2013-07-27	2013-04-30	2013-01-26	2012-10-27	2012-07-28	2012-04-30	2012-01-28	2011-10-29	2011-07-30	2011-04-30	2011-01-29	2010-10-30	2010-07-31
TTM Greenblatt ROC _ _	▅▅▃▄▆▄▄▅█▃▅▂█▃▃▁▄▄▄▂▄▄▃▂▄▄▄▂▂▃▅▃▇▄▅▃▇	13.898	12.297	-1.108	8.053	18.895	7.841	6.644	14.198	30.755	-0.228	9.264	-8.162	34.023	-1.425	-4.487	-15.58	6.831	5.065	6.903	-9.064	7.469	5.148	-4.13	-6.473	6.947	8.643	3.933	-7.104	-5.954	-1.066	13.074	-2.252	25.744	7.329	9.574	0.429	25.178	NA	NA	NA

		2020-10-31	2020-08-01	2020-01-25	2019-10-26	2019-07-27	2019-01-26	2018-10-27	2018-07-28	2018-04-30	2018-01-27	2017-10-28	2017-07-29	2017-04-30	2017-01-28	2016-10-29	2016-07-30	2016-04-30	2016-01-30	2015-10-31	2015-08-01	2015-04-30	2015-01-31	2014-11-01	2014-08-02	2014-04-30	2014-01-25	2013-10-26	2013-07-27	2013-04-30	2013-01-26	2012-10-27	2012-07-28	2012-04-30	2012-01-28	2011-10-29	2011-07-30	2011-04-30	2011-01-29	2010-10-30	2010-07-31
us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax		NA	NA	NA	NA	NA	NA	NA	NA	87.93	75.322	72.979	78.043	113.629	54.633	65.801	34.361	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA
us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:BalanceSheetLocation avav:ContractLiability	█▅▁▃▃▁▁▄▁▁▁	3.451	1.973	0.012	0.828	0.83	0.01	0.006	1.548	0.0	0.062	0.0	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA
us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:ContractWithCustomerBasisOfPricing avav:Cpff	▇█▆▆▅▆▇▅▇▃▁▁	24.23	26.569	20.863	21.257	18.264	22.37	22.87	19.983	25.02	12.862	8.948	8.373	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA
us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:ContractWithCustomerBasisOfPricing avav:Ffp	▆▅▃▅▆▄▄▅█▃▄▁	68.425	60.875	40.145	60.518	67.944	52.833	50.054	58.003	88.602	41.759	56.761	25.854	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA
us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:ContractWithCustomerBasisOfPricing avav:TM	▁▁▅█▄▂▁▁▁▁▁▂	0.01	0.006	0.883	1.496	0.703	0.119	0.055	0.057	0.007	0.012	0.092	0.134	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA
us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:MajorCustomers avav:NonU.s.Government	▆▅▅▅▆▃▄▆█▃▃▁	37.071	33.654	36.356	32.969	37.777	22.939	26.038	42.135	51.124	23.613	25.223	11.468	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA
us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:MajorCustomers avav:USGovernment	██▁▇▆▇▆▃	55.594	53.796	25.535	50.302	49.134	52.383	46.941	35.908	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA
us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:ProductOrService avav:Haps	▆█▆▆▆▇▆▆▇▂▃▁	11.452	16.386	11.762	13.393	12.335	13.586	12.832	11.563	14.551	5.42	7.071	2.551	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA
us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:ProductOrService avav:Other	▆██▄▃▄▄▃▃▁▃▃	3.987	5.328	5.256	2.797	2.244	2.762	2.929	2.498	2.282	1.082	2.343	2.184	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA
us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:ProductOrService avav:SmallUas	▆▆▃▇█▅▄▄█▃▅▁	58.265	56.202	36.965	59.157	66.745	47.704	42.199	41.216	68.747	31.705	47.021	20.061	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA
us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:ProductOrService avav:Tms	▅▂▂▂▁▃▄▆█▄▂▂	18.961	9.534	7.908	7.924	5.587	11.27	15.019	22.766	28.049	16.426	9.366	9.565	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA
us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:ProductOrService us-gaap:Product	▆▅▃▅▆▄▄▅█▃▄▁	65.528	58.357	36.432	57.386	65.839	50.024	47.056	55.313	85.065	39.447	48.42	18.78	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA
us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:ProductOrService us-gaap:Service	▇█▆▆▄▆▆▅█▁▂	27.137	29.093	25.459	25.885	21.072	25.298	25.923	22.73	28.564	15.186	17.381	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA
us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:StatementGeographical avav:GeographicDistributionInternational	▆▄▄▄▆▅▃▅█▃▃▁	46.267	34.02	34.265	33.306	48.103	40.886	26.253	42.691	61.054	25.79	26.631	12.791	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA
us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:StatementGeographical us-gaap:GeographicDistributionDomestic	▆█▂▇▅▄▇▄█▃▅▁	46.398	53.43	27.626	49.965	38.808	34.436	46.726	35.352	52.575	28.843	39.17	21.57	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA
us-gaap:Revenues	▅▅▃▅▅▄▄▄▇▃▄▂█▂▂▁▅▃▃▂▅▄▂▂▄▄▃▂▂▂▄▃▇▄▄▃▆▅▃▁	92.665	87.45	61.891	83.271	86.911	75.322	72.979	78.043	117.381	63.935	73.827	43.764	125.376	53.163	50.116	36.218	84.757	67.56	64.731	47.05	86.471	68.397	52.664	51.866	73.498	69.221	64.867	44.117	54.11	47.087	80.278	58.677	110.675	71.964	80.372	61.997	106.06	84.434	63.781	38.228
us-gaap:CostOfRevenue	▅▅▃▅▄▄▄▄▄▄▄▂█▂▂▂▅▄▂▂▄▄▂▃▄▄▄▂▃▁▄▃▇▄▅▃▆▅▄▁	51.814	52.039	38.395	48.105	45.639	44.93	44.58	45.454	43.854	43.349	42.827	32.134	66.717	33.812	32.699	29.535	46.835	40.935	33.198	31.027	41.121	41.404	34.793	37.812	43.36	42.169	40.989	31.572	36.388	27.414	44.642	39.172	61.12	44.531	49.742	40.282	56.849	50.305	42.006	26.192
us-gaap:CostOfGoodsAndServicesSold	▆▆▃▅▅▅▅▅█▃▃▁▄▃▂▂▅▄▂▂▄▄▃▃▄▄▄▂▃▁▅▄█▅▆▄▇▆▄▁	51.814	52.039	38.395	48.105	45.639	44.93	44.58	45.454	63.035	36.383	35.658	25.663	40.186	33.812	32.699	29.535	46.835	40.935	33.198	31.027	41.121	41.404	34.793	37.812	43.36	42.169	40.989	31.572	36.388	27.414	44.642	39.172	61.12	44.531	49.742	40.282	56.849	50.305	42.006	26.192
us-gaap:GrossProfit	▆▅▃▅▆▄▄▄▇▃▄▂█▃▂▁▅▄▄▂▆▄▃▂▄▄▃▂▂▃▅▃▇▄▄▃▇▅▃▂	40.851	35.411	23.496	35.166	41.272	30.392	28.399	32.589	52.18	20.586	31.0	11.63	58.659	19.351	17.417	6.683	37.922	26.625	31.533	16.023	45.35	26.993	17.871	14.054	30.138	27.052	23.878	12.545	17.722	19.673	35.636	19.505	49.555	27.433	30.63	21.715	49.211	34.129	21.775	12.036
us-gaap:ResearchAndDevelopmentExpense	▄▃▄▃▂▂▂▁▁▂▂▂▂▂▂▂▅▂▃▃█▂▂▂▁▁▂▂▃▃▃▂▂▂▂▂▃▂▂▂	11.976	11.103	11.381	10.858	8.709	8.087	8.109	6.435	5.386	7.314	7.272	6.461	7.937	7.988	8.517	8.6	14.316	8.247	9.897	9.831	22.259	8.577	8.531	7.124	6.223	5.241	6.861	7.19	9.386	10.306	9.386	8.136	7.337	7.238	8.816	7.586	11.236	7.872	8.689	7.972
us-gaap:SellingGeneralAndAdministrativeExpense	▆▃▄▇▅▆▅▃▁▅▆▅█▄▅▅█▅▆▆▇▅▅▅█▄▄▄▅▂▄▅█▄▄▅▄▂▄▃	14.977	12.011	13.223	16.255	13.668	14.464	13.646	11.956	9.531	13.5	14.464	13.331	16.699	12.788	13.387	13.663	16.775	13.313	14.733	15.256	15.622	13.268	13.47	13.403	16.968	13.168	13.084	12.459	14.29	10.433	13.176	13.621	16.474	12.866	12.24	13.7	12.797	10.578	12.685	11.371
us-gaap:OperatingIncomeLoss	▅▅▃▄▆▄▄▅█▃▅▂█▃▃▁▄▄▄▂▄▄▃▂▄▄▄▂▂▃▅▃▇▄▅▃▇▅▃▂	13.898	12.297	-1.108	8.053	18.895	7.841	6.644	14.198	30.755	-0.228	9.264	-8.162	34.023	-1.425	-4.487	-15.58	6.831	5.065	6.903	-9.064	7.469	5.148	-4.13	-6.473	6.947	8.643	3.933	-7.104	-5.954	-1.066	13.074	-2.252	25.744	7.329	9.574	0.429	25.178	15.679	0.401	-7.307
us-gaap:OtherNonoperatingIncomeExpense	▃▃▃▃▃▄▄█▃▃▃▃▃▃▃▃▃▃▃▂▃▃▃▃▅▆▂▁▇▃	0.072	0.033	0.12	0.157	0.355	0.962	1.291	8.388	0.11	-0.108	-0.055	0.004	0.536	-0.046	-0.13	-0.3	0.097	-0.215	-0.192	-2.389	-0.727	-0.284	-0.583	0.591	2.648	4.675	-2.307	-3.394	6.196	0.049	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA
us-gaap:AllocatedShareBasedCompensationExpense		NA	NA	-1.736	0.136	1.6	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA
us-gaap:AllocatedShareBasedCompensationExpense us-gaap:AwardType,us-gaap:PlanName us-gaap:PerformanceShares,avav:Fiscal2018Ltip		NA	NA	0.201	0.046	0.008	0.317	0.113	0.49	0.269	0.0	0.0	0.0	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA
us-gaap:AllocatedShareBasedCompensationExpense us-gaap:AwardType,us-gaap:PlanName us-gaap:PerformanceShares,avav:Fiscal2019Ltip	▆▃█▁▂▁▇▂	0.189	0.075	0.246	0.016	0.033	0.0226	0.211	0.044	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA
us-gaap:AllocatedShareBasedCompensationExpense us-gaap:AwardType,us-gaap:PlanName us-gaap:PerformanceShares,avav:Fiscal2020Ltip	█▁▆▄▃	0.264	0.08	0.215	0.166	0.131	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA
us-gaap:AllocatedShareBasedCompensationExpense us-gaap:AwardType,us-gaap:PlanName us-gaap:PerformanceShares,avav:Fiscal2021Ltip	█▁	0.347	0.091	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA
us-gaap:AllocatedShareBasedCompensationExpense us-gaap:PlanName avav:Fiscal2019And2020And2021Ltip	▁█	0.8	1.853	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA
us-gaap:AllocatedShareBasedCompensationExpense us-gaap:Range,us-gaap:AwardType,us-gaap:PlanName srt:Maximum,us-gaap:PerformanceShares,avav:Fiscal2019Ltip	▂▇▂▁█▂	0.0	2.478	0.0	-0.455	2.933	0.0	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA
us-gaap:AllocatedShareBasedCompensationExpense us-gaap:Range,us-gaap:AwardType,us-gaap:PlanName srt:Maximum,us-gaap:PerformanceShares,avav:Fiscal2020Ltip	▂▇▂▁█	0.0	4.263	0.0	-0.433	4.696	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA
us-gaap:AllocatedShareBasedCompensationExpense us-gaap:Range,us-gaap:AwardType,us-gaap:PlanName srt:Maximum,us-gaap:PerformanceShares,avav:Fiscal2021Ltip	▁█	0.0	7.946	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA
us-gaap:IncomeLossFromContinuingOperations		NA	NA	-1.008	7.501	17.11	8.431	7.047	20.337	19.838	-0.647	7.756	-4.371	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA
us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	▅▅▂▄▆▄▄▇█▃▄▁	14.085	12.538	0.134	9.476	20.579	10.075	9.003	23.492	29.931	0.596	10.908	-7.615	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA
us-gaap:IncomeTaxExpenseBenefit	▄▄▃▄▄▄▄▄█▄▅▂▅▄▃▁▄▃▄▁▃▅▂▂▄▄▃▂▄▁▅▃▇▄▅▃▇▅▃▁	2.491	1.207	-0.038	1.108	2.133	0.946	1.211	2.567	9.9	0.628	2.829	-3.18	4.561	1.102	-0.048	-3.863	1.923	-1.133	2.56	-4.248	-0.085	2.763	-1.619	-2.061	1.796	2.299	0.166	-3.083	1.265	-4.722	4.498	-0.694	8.099	1.714	3.093	0.181	7.604	4.274	0.184	-3.743
us-gaap:IncomeTaxesPaidNet	▄▁▁▁▁▃█▁	2.354	0.01	0.0	0.224	0.294	1.507	5.277	-0.007	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA
us-gaap:IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	▃▅▂▄▇▅▄██▂▄▁	2.072	10.043	-1.028	7.505	17.099	8.412	7.04	20.323	19.86	-0.656	7.55	-4.394	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA
us-gaap:ProfitLoss	▃▅▃▄▆▄▄▇▆▃▄▂█▃▂▁	2.072	10.043	-1.028	7.505	17.099	8.35	6.05	27.316	18.343	-0.837	6.812	-4.466	30.454	-2.183	-4.172	-11.642	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	0.326	NA	NA	NA	-3.443
us-gaap:ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	▇▆▇▇▇▇▇▇█▇▁▇	-0.022	-0.037	-0.02	0.004	-0.011	-0.019	-0.007	-0.014	0.022	-0.009	-0.206	-0.023	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA
us-gaap:ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	▃▅▃▄▆▄▄▇▆▃▄▂█▃▂▁	2.063	10.066	-1.14	7.515	17.268	8.368	6.046	27.367	18.323	-0.753	7.044	-4.441	30.518	-2.194	-4.147	-11.624	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA
us-gaap:ComprehensiveIncomeNetOfTax	▂▄▁▃▆▃▃█	2.085	10.103	-1.12	7.511	17.279	8.368	6.046	27.367	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	3.884	8.728	-1.349	17.797	5.788	6.628	0.328	NA	NA	NA	NA
us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic	▃▅▃▄▆▄▄▇▆▃▄▂█▃▂▁▄▄▄▂▄▃▂▂▄▅▃▂▃▄▄▃▆▄▄▃▆▅▃	2.094	10.08	-1.008	7.501	17.11	8.369	6.057	27.33	18.321	-0.828	7.018	-4.443	30.476	-2.183	-4.172	-11.642	5.364	6.164	4.419	-6.981	7.08	2.325	-2.901	-3.609	8.057	11.216	1.655	-7.21	-0.795	3.869	8.738	-1.386	17.794	5.744	6.587	0.326	17.636	11.454	0.262	NA

		2020-10-31	2020-08-01	2020-01-25	2019-10-26	2019-07-27	2019-01-26	2018-10-27	2018-07-28	2018-04-30	2018-01-27	2017-10-28	2017-07-29	2017-04-30	2017-01-28	2016-10-29	2016-07-30	2016-04-30	2016-01-30	2015-10-31	2015-08-01	2015-04-30	2015-01-31	2014-11-01	2014-08-02	2014-04-30	2014-01-25	2013-10-26	2013-07-27	2013-04-30	2013-01-26	2012-10-27	2012-07-28	2012-04-30	2012-01-28	2011-10-29	2011-07-30	2011-04-30	2011-01-29	2010-10-30	2010-07-31

		2020-10-31	2020-08-01	2020-01-25	2019-10-26	2019-07-27	2019-01-26	2018-10-27	2018-07-28	2018-04-30	2018-01-27	2017-10-28	2017-07-29	2017-04-30	2017-01-28	2016-10-29	2016-07-30	2016-04-30	2016-01-30	2015-10-31	2015-08-01	2015-04-30	2015-01-31	2014-11-01	2014-08-02	2014-04-30	2014-01-25	2013-10-26	2013-07-27	2013-04-30	2013-01-26	2012-10-27	2012-07-28	2012-04-30	2012-01-28	2011-10-29	2011-07-30	2011-04-30	2011-01-29	2010-10-30	2010-07-31
us-gaap:Assets	██▇▇▇▆▆▅▅▄▄▄▄▃▃▃▄▃▃▃▃▃▃▃▃▃▂▂▃▂▂▂▃▂▂▁▂	588.007	577.819	559.08	544.493	534.582	498.963	486.567	480.361	472.911	432.845	429.263	420.739	432.5	387.456	389.898	389.534	410.393	389.491	380.029	383.274	397.467	386.471	386.129	378.603	384.954	366.881	350.816	351.559	363.465	358.79	356.306	340.488	369.151	324.545	322.939	301.472	331.747	NA	NA	NA
us-gaap:LiabilitiesAndStockholdersEquity	██▇▇▇▆▆▅▅▄▄▄▄▃▃▃▄▃▃▃▃▃▃▃▃▃▂▂▃▂▂▂▃▂▂▁▂	588.007	577.819	559.08	544.493	534.582	498.963	486.567	480.361	472.911	432.845	429.263	420.739	432.5	387.456	389.898	389.534	410.393	389.491	380.029	383.274	397.467	386.471	386.129	378.603	384.954	366.881	350.816	351.559	363.465	358.79	356.306	340.488	369.151	324.545	322.939	301.472	331.747	NA	NA	NA
us-gaap:StockholdersEquity	██▇▇▇▆▆▆▅▄▄▄▄▃▃▃▃▃▃▃▃▃▃▃▃▂▂▂▂▂▂▂▂▁▁	523.906	519.929	490.741	490.36	481.506	455.566	444.174	437.05	410.117	390.388	389.401	380.722	381.954	347.246	348.147	351.48	361.26	354.571	346.727	345.107	348.912	340.83	338.144	340.755	342.467	324.658	311.682	308.799	315.186	315.095	310.237	299.204	299.198	279.818	272.748	NA	263.468	NA	NA	NA

		2020-10-31	2020-08-01	2020-01-25	2019-10-26	2019-07-27	2019-01-26	2018-10-27	2018-07-28	2018-04-30	2018-01-27	2017-10-28	2017-07-29	2017-04-30	2017-01-28	2016-10-29	2016-07-30	2016-04-30	2016-01-30	2015-10-31	2015-08-01	2015-04-30	2015-01-31	2014-11-01	2014-08-02	2014-04-30	2014-01-25	2013-10-26	2013-07-27	2013-04-30	2013-01-26	2012-10-27	2012-07-28	2012-04-30	2012-01-28	2011-10-29	2011-07-30	2011-04-30	2011-01-29	2010-10-30	2010-07-31
us-gaap:AssetsCurrent	█▇▇▇▇▆▆▅▅▄▄▄▄▃▃▃▄▃▃▃▃▃▃▃▃▂▁▁▁▁▁▁▂▁▂▁▂	507.599	486.792	457.334	456.152	455.329	436.875	421.912	410.203	399.147	355.255	357.674	346.994	354.085	308.948	313.887	323.765	349.703	329.63	321.32	318.181	329.032	309.896	311.567	313.731	306.857	289.379	265.763	250.565	263.454	266.809	263.95	254.985	281.769	257.207	271.623	267.243	298.031	NA	NA	NA
us-gaap:CashAndCashEquivalentsAtCarryingValue	█▇▄▄▄▄▄▅▄▃▃▃▂▂▂▃▃▃▄▄▄▄▄▄▄▃▂▂▂▂▂▁▂▂▃▂▂▁▂▁	280.099	246.839	131.496	130.742	137.094	149.369	151.255	170.788	143.517	112.304	117.109	117.473	79.904	73.278	88.876	122.313	124.287	122.706	128.032	146.45	143.41	125.977	126.339	148.052	126.969	92.749	66.126	64.339	75.332	63.975	70.77	53.21	64.22	65.865	98.589	81.247	62.041	39.099	76.664	45.442
us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	█▁	280.099	246.839	NA	135.742	142.094	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA
us-gaap:ShortTermInvestments	▁▁▇██▇▆▅▄▄▄▄▅▅▅▄▄▃▂▁▂▂▂▂▁▂▂▁▂▁▁▁▂▃▂▄▅	67.137	71.334	148.502	161.635	163.634	144.815	138.536	118.303	113.649	109.543	110.751	107.831	119.971	121.095	118.208	101.802	103.404	97.692	77.967	71.018	85.381	77.581	81.12	76.84	70.639	74.83	77.677	64.474	73.241	69.811	64.694	69.473	77.152	88.572	78.782	106.883	126.839	NA	NA	NA
us-gaap:AccountsReceivableNetCurrent	▃▄▃▄▄▃▃▁▆▂▃▃█▂▂▃▆▄▄▃▃▄▃▂▃▄▄▂▂▃▅▅▆▂▂▂▅	30.701	43.357	27.936	40.564	42.724	34.064	34.639	13.802	56.813	25.69	35.106	30.685	74.361	23.121	26.102	32.635	56.045	38.991	42.746	28.205	33.607	37.834	31.096	23.213	31.739	42.617	36.238	19.604	19.77	31.6	48.33	49.88	56.417	24.213	25.571	22.034	44.376	NA	NA	NA
us-gaap:InventoryNet	▄▂▆▄▄▃▃▂▁██▇▅▇▄▂▁▃▃▂▁▃▄▃▃▄▅▆▅▆▂▂▂▃▂▁▁	51.779	45.53	65.156	52.769	56.336	50.379	46.096	42.244	38.64	77.327	76.039	72.017	60.076	68.806	55.168	44.105	37.486	46.434	48.336	43.921	39.414	48.799	51.804	46.441	50.699	55.441	60.629	68.663	62.561	63.597	44.747	44.505	43.539	48.447	41.435	38.299	38.137	NA	NA	NA
us-gaap:InventoryFinishedGoods	▅▄▃▃▄▄▄▂▁▆▇█▅▅▅▅▄▅▅▄▄▅▆▅▅▇▇█▇▆▅▄▄	28.356	26.64	23.169	22.651	27.029	25.076	24.241	17.057	14.578	31.958	37.164	40.782	30.793	30.539	30.961	28.406	26.073	29.015	28.937	26.435	25.537	30.865	34.296	29.631	31.289	37.292	37.536	40.817	36.842	32.308	28.026	25.318	24.934	NA	NA	NA	NA	NA	NA	NA
us-gaap:PrepaidExpenseAndOtherAssetsCurrent	▇▅▇█▇▆▅▅▄▅▅▅▅▅▄▃▃▃▄▃▄▃▃▂▃▃▄▃▄▄▄▃▃▂▂▁▁	7.31	5.941	6.833	8.045	7.606	6.616	5.732	5.196	5.103	5.138	5.175	5.266	5.653	5.341	4.706	4.167	4.15	4.219	4.555	3.958	4.599	4.203	4.233	3.32	4.26	3.755	4.317	3.765	4.303	4.283	4.837	3.568	4.03	2.793	2.974	2.176	2.372	NA	NA	NA

		2020-10-31	2020-08-01	2020-01-25	2019-10-26	2019-07-27	2019-01-26	2018-10-27	2018-07-28	2018-04-30	2018-01-27	2017-10-28	2017-07-29	2017-04-30	2017-01-28	2016-10-29	2016-07-30	2016-04-30	2016-01-30	2015-10-31	2015-08-01	2015-04-30	2015-01-31	2014-11-01	2014-08-02	2014-04-30	2014-01-25	2013-10-26	2013-07-27	2013-04-30	2013-01-26	2012-10-27	2012-07-28	2012-04-30	2012-01-28	2011-10-29	2011-07-30	2011-04-30	2011-01-29	2010-10-30	2010-07-31
us-gaap:PropertyPlantAndEquipmentGross		NA	NA	NA	NA	NA	NA	NA	NA	88.266	NA	NA	NA	101.941	NA	NA	NA	92.759	NA	NA	NA	84.376	NA	NA	NA	83.197	NA	NA	NA	78.811	NA	NA	NA	67.766	NA	NA	NA	NA	NA	NA	NA
us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType avav:ComputerEquipmentAndSoftware		NA	NA	NA	NA	NA	NA	NA	NA	31.895	NA	NA	NA	32.485	NA	NA	NA	30.171	NA	NA	NA	26.223	NA	NA	NA	24.377	NA	NA	NA	23.432	NA	NA	NA	14.894	NA	NA	NA	NA	NA	NA	NA
us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType us-gaap:ConstructionInProgress		NA	NA	NA	NA	NA	NA	NA	NA	3.359	NA	NA	NA	4.608	NA	NA	NA	3.885	NA	NA	NA	1.634	NA	NA	NA	6.344	NA	NA	NA	7.142	NA	NA	NA	9.103	NA	NA	NA	NA	NA	NA	NA
us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType us-gaap:FurnitureAndFixtures		NA	NA	NA	NA	NA	NA	NA	NA	2.094	NA	NA	NA	1.962	NA	NA	NA	1.73	NA	NA	NA	1.877	NA	NA	NA	1.84	NA	NA	NA	1.866	NA	NA	NA	2.415	NA	NA	NA	NA	NA	NA	NA
us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType us-gaap:LeaseholdImprovements		NA	NA	NA	NA	NA	NA	NA	NA	10.541	NA	NA	NA	9.809	NA	NA	NA	8.939	NA	NA	NA	9.117	NA	NA	NA	8.611	NA	NA	NA	8.498	NA	NA	NA	8.471	NA	NA	NA	NA	NA	NA	NA
us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType us-gaap:MachineryAndEquipment		NA	NA	NA	NA	NA	NA	NA	NA	40.377	NA	NA	NA	53.077	NA	NA	NA	48.034	NA	NA	NA	45.525	NA	NA	NA	42.025	NA	NA	NA	37.873	NA	NA	NA	32.883	NA	NA	NA	NA	NA	NA	NA
us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment		NA	NA	NA	NA	NA	NA	NA	NA	69.047	NA	NA	NA	82.721	NA	NA	NA	75.997	NA	NA	NA	70.877	NA	NA	NA	63.2	NA	NA	NA	54.382	NA	NA	NA	44.251	NA	NA	NA	NA	NA	NA	NA
us-gaap:AmortizationOfIntangibleAssets	▇▇██▆▁▁▁	0.715	0.709	0.775	0.775	0.552	0.104	0.08	0.069	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA
us-gaap:PropertyPlantAndEquipmentNet	▆▆▅▅▃▅▅▄▄▅▅▅▄▄▃▃▃▂▁▁▁▃▃▃▅▇██▇▅▆▆▆▅▄▄▃	22.868	22.907	19.877	20.571	17.747	20.542	20.46	19.347	19.219	21.626	21.614	20.317	19.22	18.41	17.445	16.91	16.762	14.313	13.579	13.023	13.499	16.143	16.889	17.897	19.997	24.492	26.039	26.725	24.429	21.714	22.137	23.131	23.515	20.936	18.841	18.134	17.498	NA	NA	NA
us-gaap:LongTermInvestments	▃▃▃▂▁▄▄▄▅▅▄▄▅▅▅▄▄▅▅▅▆▆▆▅▆▅▆██▇█▇▇▄▃▁▁	20.976	20.338	26.409	13.478	4.887	27.954	30.459	36.712	40.656	38.822	33.024	35.844	42.096	43.749	42.559	33.097	33.859	38.175	37.715	44.727	46.769	54.575	49.718	39.315	50.505	45.877	51.707	67.595	68.916	60.928	64.798	56.958	58.457	36.497	22.556	6.154	6.275	NA	NA	NA
us-gaap:Goodwill	▁▁▁██	6.34	6.34	6.34	8.08	8.08	NA	NA	NA	NA	NA	NA	0.122	0.122	NA	NA	0.122	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA
us-gaap:IntangibleAssetsNetExcludingGoodwill	▁▂▄▇█	12.213	12.928	14.357	15.952	16.727	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA
us-gaap:FiniteLivedIntangibleAssetsNet		NA	NA	NA	NA	NA	0.562	0.666	0.559	0.628	0.729	0.766	1.744	1.407	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA
us-gaap:DeferredTaxAssetsLiabilitiesNet		NA	NA	NA	NA	NA	NA	NA	NA	11.101	NA	NA	NA	14.973	NA	NA	NA	14.751	NA	NA	NA	12.691	NA	NA	NA	11.759	NA	NA	NA	10.772	NA	NA	NA	14.586	NA	NA	NA	NA	NA	NA	NA
us-gaap:OperatingLeaseRightOfUseAsset	▁█	12.363	13.612	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA
us-gaap:OtherAssetsNoncurrent	▁▅█▆▇▁▂▂▂▂▁▂▂▁▁▁▁▁▁▁▁▁▁▁▁▂▂▁▁▃▁▁▁▁▁▁▁	0.102	9.64	16.995	13.339	14.196	0.884	1.628	2.299	2.721	2.305	0.838	1.938	2.01	0.57	0.598	0.658	0.75	0.653	0.69	0.672	0.741	1.219	0.837	0.971	0.874	1.585	1.72	1.036	1.06	4.159	0.23	0.23	0.201	0.201	0.186	0.181	0.181	NA	NA	NA

		2020-10-31	2020-08-01	2020-01-25	2019-10-26	2019-07-27	2019-01-26	2018-10-27	2018-07-28	2018-04-30	2018-01-27	2017-10-28	2017-07-29	2017-04-30	2017-01-28	2016-10-29	2016-07-30	2016-04-30	2016-01-30	2015-10-31	2015-08-01	2015-04-30	2015-01-31	2014-11-01	2014-08-02	2014-04-30	2014-01-25	2013-10-26	2013-07-27	2013-04-30	2013-01-26	2012-10-27	2012-07-28	2012-04-30	2012-01-28	2011-10-29	2011-07-30	2011-04-30	2011-01-29	2010-10-30	2010-07-31
us-gaap:LiabilitiesCurrent	▆▄▇▄▄▃▃▃▇▃▃▃▅▃▃▂▄▂▁▂▄▄▄▂▃▂▂▂▄▃▃▂█▃▄▁█	53.478	46.323	60.476	44.791	43.108	41.786	39.491	40.752	60.497	40.545	37.851	37.697	48.063	37.968	39.4	35.587	46.345	32.87	31.597	36.398	46.735	43.66	43.241	33.049	37.735	35.981	33.309	36.853	42.187	38.827	41.134	36.282	63.705	38.866	43.887	29.832	62.104	NA	NA	NA
us-gaap:AccountsPayableCurrent	▂▂▂▁▂▂▂▂▅▂▃▂▄▂▄▁▄▁▂▂▄▃▄▂▂▃▂▂▃▃▃▂▄▂▄▂█	14.225	11.74	14.269	11.022	11.45	11.629	14.149	12.939	21.34	13.249	15.724	13.966	20.283	13.792	18.662	10.529	17.712	9.786	11.59	12.944	19.243	16.215	18.988	13.125	13.906	15.135	11.774	13.545	16.144	15.777	15.43	13.085	20.213	13.375	19.617	12.549	31.134	NA	NA	NA
us-gaap:AccruedIncomeTaxesCurrent	█▁	3.018	2.62	NA	NA	NA	4.857	4.851	8.898	4.085	NA	0.35	NA	1.418	NA	NA	NA	0.943	NA	NA	NA	0.692	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA
us-gaap:OperatingLeaseLiabilityCurrent	▁█	4.03	4.478	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA
us-gaap:OtherLiabilitiesCurrent	▆▄██▇▃▂▂▂▄▃▄▅▃▂█▆▂▁▄▄▅▅▁▂▂▂▂▂▂▁▃▅▄▄▃▃	10.511	8.735	13.046	13.141	12.167	8.062	6.971	6.664	6.892	8.651	7.441	8.53	10.079	7.753	6.997	12.708	11.173	6.408	5.669	8.757	9.17	10.264	9.709	5.861	6.762	6.486	6.261	7.194	6.408	6.877	6.129	7.391	9.898	9.114	8.343	7.535	7.384	NA	NA	NA
us-gaap:ContractWithCustomerLiabilityCurrent		NA	NA	NA	NA	3.268	2.875	2.449	NA	3.564	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA

		2020-10-31	2020-08-01	2020-01-25	2019-10-26	2019-07-27	2019-01-26	2018-10-27	2018-07-28	2018-04-30	2018-01-27	2017-10-28	2017-07-29	2017-04-30	2017-01-28	2016-10-29	2016-07-30	2016-04-30	2016-01-30	2015-10-31	2015-08-01	2015-04-30	2015-01-31	2014-11-01	2014-08-02	2014-04-30	2014-01-25	2013-10-26	2013-07-27	2013-04-30	2013-01-26	2012-10-27	2012-07-28	2012-04-30	2012-01-28	2011-10-29	2011-07-30	2011-04-30	2011-01-29	2010-10-30	2010-07-31
us-gaap:MinorityInterest	▁▂▂▂▂▂▂▃▃▂▃▇█	-0.059	-0.037	-0.023	-0.003	-0.007	-0.017	0.002	0.009	0.023	0.001	0.009	0.216	0.239	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA
us-gaap:OtherLiabilitiesNoncurrent	▁▁▁██▁▅▃▂▁▁▁▁▁▁▁▁	0.243	0.243	0.25	2.422	2.298	0.16	1.306	0.958	0.622	0.184	0.184	0.184	0.184	0.193	0.193	0.184	0.184	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA
us-gaap:OperatingLeaseLiabilityNoncurrent	▁█	9.422	10.344	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	▁█	4.581	4.653	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree	▁█	3.173	3.247	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour	▁█	2.608	2.615	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive	▁█	1.661	1.668	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA
us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive	▁█	0.763	0.773	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA

		2020-10-31	2020-08-01	2020-01-25	2019-10-26	2019-07-27	2019-01-26	2018-10-27	2018-07-28	2018-04-30	2018-01-27	2017-10-28	2017-07-29	2017-04-30	2017-01-28	2016-10-29	2016-07-30	2016-04-30	2016-01-30	2015-10-31	2015-08-01	2015-04-30	2015-01-31	2014-11-01	2014-08-02	2014-04-30	2014-01-25	2013-10-26	2013-07-27	2013-04-30	2013-01-26	2012-10-27	2012-07-28	2012-04-30	2012-01-28	2011-10-29	2011-07-30	2011-04-30	2011-01-29	2010-10-30	2010-07-31
us-gaap:StockholdersEquity	██▇▇▇▆▆▆▅▄▄▄▄▃▃▃▃▃▃▃▃▃▃▃▃▂▂▂▂▂▂▂▂▁▁	523.906	519.929	490.741	490.36	481.506	455.566	444.174	437.05	410.117	390.388	389.401	380.722	381.954	347.246	348.147	351.48	361.26	354.571	346.727	345.107	348.912	340.83	338.144	340.755	342.467	324.658	311.682	308.799	315.186	315.095	310.237	299.204	299.198	279.818	272.748	NA	263.468	NA	NA	NA
us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	██▆▆▆▅▄▄▂▁▁▁▁	523.847	519.892	490.718	490.357	481.499	455.549	444.176	437.059	410.14	390.389	389.41	380.938	382.193	NA	NA	NA	361.525	NA	NA	NA	348.912	NA	NA	NA	342.467	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	265.201	263.468	NA	NA	NA
us-gaap:AdditionalPaidInCapitalCommonStock	███▇▇▇▇▇▇▆▆▆▆▅▅▅▅▅▄▄▄▄▄▄▄▃▂▂▂▂▂▂▂▁▁▁▁	183.298	181.406	180.051	178.55	177.207	174.891	171.867	170.789	170.139	168.735	166.993	165.359	162.15	157.96	156.667	155.853	154.274	152.942	151.269	150.337	148.293	147.374	146.431	145.497	143.648	134.251	132.549	131.398	130.527	129.588	128.614	126.309	124.954	123.371	122.089	121.17	119.765	NA	NA	NA
us-gaap:RetainedEarningsAccumulatedDeficit	██▇▇▇▆▆▅▄▄▄▄▄▃▃▃▃▃▃▃▃▃▃▃▃▃▂▂▂▂▂▂▂▁▁▁▁	340.264	338.17	310.619	311.627	304.126	280.669	272.3	266.243	239.997	221.676	222.504	215.486	219.929	189.453	191.636	195.808	207.185	201.821	195.657	194.994	201.975	194.895	192.57	195.471	199.08	191.023	179.807	178.152	185.362	186.157	182.288	173.55	174.936	157.142	151.398	144.811	144.485	NA	NA	NA
us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax	██▇▇▇▇▇▇▇▇▆▆▆▆▆▆▆▆▆▆▁▁▃▆▆▄▄▄▄▄▄▄▄▄▄▄▄	0.342	0.351	0.069	0.181	0.171	0.004	0.005	0.016	-0.021	-0.025	-0.098	-0.125	-0.127	-0.169	-0.158	-0.183	-0.201	-0.194	-0.201	-0.226	-1.358	-1.441	-0.859	-0.215	-0.263	-0.618	-0.676	-0.753	-0.705	-0.652	-0.667	-0.657	-0.694	-0.697	-0.741	-0.782	-0.784	NA	NA	NA
us-gaap:MinorityInterest	▁▂▂▂▂▂▂▃▃▂▃▇█	-0.059	-0.037	-0.023	-0.003	-0.007	-0.017	0.002	0.009	0.023	0.001	0.009	0.216	0.239	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA
us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	▄▂▃▂▂█▁▂	1.914	1.595	1.767	1.418	1.566	3.082	1.23	1.402	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA

		2020-10-31	2020-08-01	2020-01-25	2019-10-26	2019-07-27	2019-01-26	2018-10-27	2018-07-28	2018-04-30	2018-01-27	2017-10-28	2017-07-29	2017-04-30	2017-01-28	2016-10-29	2016-07-30	2016-04-30	2016-01-30	2015-10-31	2015-08-01	2015-04-30	2015-01-31	2014-11-01	2014-08-02	2014-04-30	2014-01-25	2013-10-26	2013-07-27	2013-04-30	2013-01-26	2012-10-27	2012-07-28	2012-04-30	2012-01-28	2011-10-29	2011-07-30	2011-04-30	2011-01-29	2010-10-30	2010-07-31
us-gaap:NetCashProvidedByUsedInOperatingActivities	█▁	31.752	26.841	NA	4.806	3.113	NA	NA	NA	NA	3.997	2.837	21.282	NA	-8.145	-5.036	-1.243	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	1.456	NA	NA	NA	-5.254
us-gaap:NetCashProvidedByUsedInInvestingActivities	█▁	1.53	-33.474	NA	-11.083	-33.152	NA	NA	NA	NA	-9.195	-3.543	14.951	NA	-7.751	-28.304	-0.894	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	17.475	NA	NA	NA	21.896
us-gaap:NetCashProvidedByUsedInFinancingActivities	▃▁▃▃▃▃▃▂▃▄▄▅█▄▃▄	-0.022	-1.67	-0.266	-0.075	-0.575	-0.101	-0.206	-0.809	-0.051	0.393	0.342	1.336	3.106	0.298	-0.097	0.163	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	0.275	NA	NA	NA	0.135
us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	█▃▄▄▁▄▂▇	33.26	-8.303	0.754	-6.352	-30.614	-1.886	-19.533	27.271	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA

		2020-10-31	2020-08-01	2020-01-25	2019-10-26	2019-07-27	2019-01-26	2018-10-27	2018-07-28	2018-04-30	2018-01-27	2017-10-28	2017-07-29	2017-04-30	2017-01-28	2016-10-29	2016-07-30	2016-04-30	2016-01-30	2015-10-31	2015-08-01	2015-04-30	2015-01-31	2014-11-01	2014-08-02	2014-04-30	2014-01-25	2013-10-26	2013-07-27	2013-04-30	2013-01-26	2012-10-27	2012-07-28	2012-04-30	2012-01-28	2011-10-29	2011-07-30	2011-04-30	2011-01-29	2010-10-30	2010-07-31
us-gaap:NetCashProvidedByUsedInOperatingActivities	█▁	31.752	26.841	NA	4.806	3.113	NA	NA	NA	NA	3.997	2.837	21.282	NA	-8.145	-5.036	-1.243	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	1.456	NA	NA	NA	-5.254
us-gaap:ProfitLoss	▃▅▃▄▆▄▄▇▆▃▄▂█▃▂▁	2.072	10.043	-1.028	7.505	17.099	8.35	6.05	27.316	18.343	-0.837	6.812	-4.466	30.454	-2.183	-4.172	-11.642	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	0.326	NA	NA	NA	-3.443
us-gaap:DepreciationDepletionAndAmortization	█▇▇▆▆▅▅▅▁▅▅▅▅▅▅▄▄▅▄▄▅▅▆▆▆▆▆▆▇▆██▇▆▆▅▇▇▇▇	2.914	2.779	2.621	2.407	2.079	1.946	1.838	1.746	0.377	1.913	1.83	1.862	1.866	1.787	1.748	1.653	1.527	1.782	1.363	1.402	1.998	2.065	2.111	2.192	2.356	2.295	2.319	2.185	2.597	2.403	3.005	2.932	2.555	2.277	2.171	1.97	2.494	2.612	2.81	2.683
us-gaap:IncreaseDecreaseInAccountsReceivable	▃▂▃▄▅▄▆▁▇▄▅▁█▄▄▃▅▄▅▄▄▅▅▄▃▅▅▄▃▃▄▄▇▄▄▃▄▅▅▃	-12.676	-30.439	-12.645	-2.157	11.557	-0.556	20.928	-43.189	36.441	-9.212	5.137	-43.577	51.18	-2.991	-6.543	-23.019	17.208	-3.856	14.457	-5.549	-4.232	6.742	7.919	-8.667	-11.153	6.339	16.821	-0.044	-11.706	-16.958	-1.224	-6.297	32.141	-1.25	3.453	-22.012	-0.24	10.964	16.091	-21.189
us-gaap:IncreaseDecreaseInInventories	▆▅▇▄▅▅▅▅▁▅▅▇▃▇▇▆▃▄▅▅▃▄▆▄▄▄▃▆▄█▅▅▄▆▅▅▆▅▅▆	6.249	-0.005	12.387	-3.567	1.946	4.283	3.852	4.819	-19.519	1.288	4.022	11.941	-8.73	13.638	11.063	6.619	-8.948	-1.902	4.415	4.507	-9.385	-3.005	5.363	-4.258	-4.742	-5.188	-8.034	6.102	-1.036	18.85	0.242	0.966	-4.908	7.012	3.136	0.162	9.257	-0.049	0.844	7.157
us-gaap:IncreaseDecreaseInAccountsPayable	▆▄▆▅▄▅▅▃█▅▆▄▇▄▇▄▇▅▅▄▆▅▇▅▅▆▅▅▅▅▆▄▇▄▇▁▇▆▇▃	2.31	-7.338	3.745	0.064	-5.11	-1.804	1.052	-9.893	12.42	-1.945	1.499	-6.238	6.013	-4.583	7.749	-6.336	6.752	-1.804	-1.354	-6.299	3.028	-2.773	5.863	-0.781	-1.229	3.361	-1.771	-2.599	0.367	0.347	2.345	-7.128	6.838	-6.242	7.068	-18.585	7.967	1.403	9.997	-8.438
us-gaap:ShareBasedCompensation	▅▄▄▃▄█▃▃▃▃▃▃▂▂▂▂▃▃▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▂▁▁▁▁	1.914	1.595	1.767	1.418	1.566	3.082	1.23	1.287	1.057	1.291	1.211	1.397	0.973	0.923	0.821	0.992	1.392	1.088	1.043	1.039	1.054	0.969	0.899	0.846	0.935	0.847	0.93	0.91	0.841	0.987	0.802	0.84	0.877	0.784	0.781	0.754	0.634	0.595	0.576	0.501

		2020-10-31	2020-08-01	2020-01-25	2019-10-26	2019-07-27	2019-01-26	2018-10-27	2018-07-28	2018-04-30	2018-01-27	2017-10-28	2017-07-29	2017-04-30	2017-01-28	2016-10-29	2016-07-30	2016-04-30	2016-01-30	2015-10-31	2015-08-01	2015-04-30	2015-01-31	2014-11-01	2014-08-02	2014-04-30	2014-01-25	2013-10-26	2013-07-27	2013-04-30	2013-01-26	2012-10-27	2012-07-28	2012-04-30	2012-01-28	2011-10-29	2011-07-30	2011-04-30	2011-01-29	2010-10-30	2010-07-31
us-gaap:NetCashProvidedByUsedInInvestingActivities	█▁	1.53	-33.474	NA	-11.083	-33.152	NA	NA	NA	NA	-9.195	-3.543	14.951	NA	-7.751	-28.304	-0.894	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	17.475	NA	NA	NA	21.896
us-gaap:PaymentsToAcquirePropertyPlantAndEquipment	▄▆▃█▃▅▅▃▂▄▅▅▄▅▃▄▄▃▃▂▅▃▂▁▁▂▃▇█▄▄▄█▇▅▄▆▄▃▃	1.985	4.067	1.654	4.948	1.902	2.671	2.712	1.423	1.113	2.413	3.064	2.973	2.276	3.072	1.88	2.634	2.57	1.455	1.898	0.906	2.953	1.256	1.041	0.029	0.392	0.704	1.59	4.457	5.306	1.969	2.011	2.548	5.136	4.372	2.878	2.606	3.966	2.654	1.672	1.881

		2020-10-31	2020-08-01	2020-01-25	2019-10-26	2019-07-27	2019-01-26	2018-10-27	2018-07-28	2018-04-30	2018-01-27	2017-10-28	2017-07-29	2017-04-30	2017-01-28	2016-10-29	2016-07-30	2016-04-30	2016-01-30	2015-10-31	2015-08-01	2015-04-30	2015-01-31	2014-11-01	2014-08-02	2014-04-30	2014-01-25	2013-10-26	2013-07-27	2013-04-30	2013-01-26	2012-10-27	2012-07-28	2012-04-30	2012-01-28	2011-10-29	2011-07-30	2011-04-30	2011-01-29	2010-10-30	2010-07-31
us-gaap:NetCashProvidedByUsedInFinancingActivities	▃▁▃▃▃▃▃▂▃▄▄▅█▄▃▄	-0.022	-1.67	-0.266	-0.075	-0.575	-0.101	-0.206	-0.809	-0.051	0.393	0.342	1.336	3.106	0.298	-0.097	0.163	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	NA	0.275	NA	NA	NA	0.135

		2020-10-31	2020-08-01	2020-01-25	2019-10-26	2019-07-27	2019-01-26	2018-10-27	2018-07-28	2018-04-30	2018-01-27	2017-10-28	2017-07-29	2017-04-30	2017-01-28	2016-10-29	2016-07-30	2016-04-30	2016-01-30	2015-10-31	2015-08-01	2015-04-30	2015-01-31	2014-11-01	2014-08-02	2014-04-30	2014-01-25	2013-10-26	2013-07-27	2013-04-30	2013-01-26	2012-10-27	2012-07-28	2012-04-30	2012-01-28	2011-10-29	2011-07-30	2011-04-30	2011-01-29	2010-10-30	2010-07-31

Shares Issued

us-gaap:SharesIssued us-gaap:StatementEquityComponents

us-gaap:SharesIssued

us-gaap:CommonStock

Period End	2020-04-30	2020-01-25	2019-10-26	2019-07-27	2019-04-30	2019-01-26	2018-10-27	2018-07-28	2018-04-30	2017-04-30	2016-04-30	2015-04-30	2014-04-30	2013-04-30	2012-04-30	2011-04-30	2010-04-30
Value	24	23	23	23	23	23	23	23	23	23	23	23	23	22	22	21	21
Percentage of SharesIssued	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

Common Stock Shares Issued

us-gaap:CommonStockSharesIssued

Period End	2020-04-30	2020-01-25	2019-10-26	2019-07-27	2019-04-30	2019-01-26	2018-10-27	2018-07-28	2018-04-30	2018-01-27	2017-10-28	2017-07-29	2017-04-30	2017-01-28	2016-10-29	2016-07-30	2016-04-30	2016-01-30	2015-10-31	2015-08-01	2015-04-30	2015-01-31	2014-11-01	2014-08-02	2014-04-30	2014-01-25	2013-10-26	2013-07-27	2013-04-30	2013-01-26	2012-10-27	2012-07-28	2012-04-30	2012-01-28	2011-10-29	2011-07-30	2011-04-30
Value	24	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	22	22	22	22	22	22	22	22	22	22	22	21
Percentage of CommonStockSharesIssued	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

Common Stock Shares Outstanding

us-gaap:CommonStockSharesOutstanding

Period End	2020-04-30	2020-01-25	2019-10-26	2019-07-27	2019-04-30	2019-01-26	2018-10-27	2018-07-28	2018-04-30	2018-01-27	2017-10-28	2017-07-29	2017-04-30	2017-01-28	2016-10-29	2016-07-30	2016-04-30	2016-01-30	2015-10-31	2015-08-01	2015-04-30	2015-01-31	2014-11-01	2014-08-02	2014-04-30	2014-01-25	2013-10-26	2013-07-27	2013-04-30	2013-01-26	2012-10-27	2012-07-28	2012-04-30	2012-01-28	2011-10-29	2011-07-30	2011-04-30
Value	24	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	22	22	22	22	22	22	22	22	22	22	22	21
Percentage of CommonStockSharesOutstanding	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

Weighted Average Number Of Diluted Shares Outstanding

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding

Period End	2020-10-31	2020-08-01	2020-01-25	2019-10-26	2019-07-27	2019-01-26	2018-10-27	2018-07-28	2018-01-27	2017-10-28	2017-07-29	2017-01-28	2016-10-29	2016-07-30	2016-01-30	2015-10-31	2015-08-01	2015-01-31	2014-11-01	2014-08-02	2014-01-25	2013-10-26	2013-07-27	2013-01-26	2012-10-27	2012-07-28	2012-01-28	2011-10-29	2011-07-30	2011-01-29	2010-10-30	2010-07-31
Value	24	24	23	24	24	24	24	24	23	23	23	23	23	22	23	23	22	23	22	22	22	22	22	22	22	21	22	22	22	22	22	21
Percentage of WeightedAverageNumberOfDilutedSharesOutstanding	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

Weighted Average Number Of Shares Outstanding Basic

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic

Period End	2020-10-31	2020-08-01	2020-01-25	2019-10-26	2019-07-27	2019-01-26	2018-10-27	2018-07-28	2018-01-27	2017-10-28	2017-07-29	2017-01-28	2016-10-29	2016-07-30	2016-01-30	2015-10-31	2015-08-01	2015-01-31	2014-11-01	2014-08-02	2014-01-25	2013-10-26	2013-07-27	2013-01-26	2012-10-27	2012-07-28	2012-01-28	2011-10-29	2011-07-30	2011-01-29	2010-10-30	2010-07-31
Value	23	23	23	23	23	23	23	23	23	23	23	23	23	22	22	22	22	22	22	22	22	22	22	22	22	21	21	21	21	21	21	21
Percentage of WeightedAverageNumberOfSharesOutstandingBasic	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount

us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount

Period End	2020-10-31	2020-08-01	2020-01-25	2019-10-26	2019-07-27	2019-01-26	2018-10-27	2018-07-28	2018-01-27	2017-10-28	2017-07-29	2017-01-28	2016-10-29	2016-07-30	2016-01-30	2015-10-31	2015-08-01	2015-01-31	2014-11-01	2014-08-02	2014-01-25	2013-10-26	2013-07-27	2013-01-26	2012-10-27	2012-07-28	2012-01-28	2011-10-29
Value	23.0	844.0	287410.0	8402.0	3675.0	1705.0	598.0	25392.0	379750.0	0	256010.0	222070.0	199430.0	302330.0	9000.0	21000.0	0	11000.0	0	0	24000.0	29000.0	85000.0	6000.0	10000.0	7000.0	22000.0	1000.0
Percentage of AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	0.0	100.0	100.0	100.0	100.0	100.0	100.0	0.0	100.0	0.0	0.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

Earnings Per Share Basic

us-gaap:EarningsPerShareBasic

Period End	2020-10-31	2020-08-01	2020-04-30	2020-01-25	2019-10-26	2019-07-27	2019-04-30	2019-01-26	2018-10-27	2018-07-28	2018-04-30	2018-01-27	2017-10-28	2017-07-29	2017-04-30	2017-01-28	2016-10-29	2016-07-30	2016-04-30	2016-01-30	2015-10-31	2015-08-01	2015-04-30	2015-01-31	2014-11-01	2014-08-02	2014-04-30	2014-01-25	2013-10-26	2013-07-27	2013-04-30	2013-01-26	2012-10-27	2012-07-28	2012-04-30	2012-01-28	2011-10-29	2011-07-30	2011-04-30	2011-01-29	2010-10-30	2010-07-31
Value	0.09	0.42	0.74	-0.04	0.32	0.72	0.23	0.35	0.26	1.16	0.79	-0.04	0.3	-0.19	1.32	-0.09	-0.18	-0.51	0.23	0.27	0.19	-0.3	0.31	0.1	-0.13	-0.16	0.36	0.5	0.07	-0.32	-0.04	0.17	0.4	-0.06	0.81	0.26	0.3	0.02	0.82	0.53	0.01	-0.16
Percentage of EarningsPerShareBasic	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

Earnings Per Share Diluted

us-gaap:EarningsPerShareDiluted

Period End	2020-10-31	2020-08-01	2020-04-30	2020-01-25	2019-10-26	2019-07-27	2019-04-30	2019-01-26	2018-10-27	2018-07-28	2018-04-30	2018-01-27	2017-10-28	2017-07-29	2017-04-30	2017-01-28	2016-10-29	2016-07-30	2016-04-30	2016-01-30	2015-10-31	2015-08-01	2015-04-30	2015-01-31	2014-11-01	2014-08-02	2014-04-30	2014-01-25	2013-10-26	2013-07-27	2013-04-30	2013-01-26	2012-10-27	2012-07-28	2012-04-30	2012-01-28	2011-10-29	2011-07-30	2011-04-30	2011-01-29	2010-10-30	2010-07-31
Value	0.09	0.42	0.73	-0.04	0.31	0.71	0.23	0.35	0.25	1.14	0.77	-0.04	0.29	-0.19	1.3	-0.09	-0.18	-0.51	0.23	0.27	0.19	-0.3	0.31	0.1	-0.13	-0.16	0.35	0.49	0.07	-0.32	-0.04	0.17	0.39	-0.06	0.8	0.26	0.3	0.01	0.79	0.52	0.01	-0.16
Percentage of EarningsPerShareDiluted	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

Income Loss From Continuing Operations Per Basic Share

us-gaap:IncomeLossFromContinuingOperationsPerBasicShare

Period End	2020-04-30	2020-01-31	2020-01-25	2019-10-31	2019-10-26	2019-07-31	2019-07-27	2019-04-30	2019-01-31	2019-01-26	2018-10-31	2018-10-27	2018-07-31	2018-07-28	2018-04-30	2018-01-27	2017-10-28	2017-07-29	2017-04-30	2017-01-28	2016-10-29	2016-07-30
Value	0.74	-0.04	-0.04	0.32	0.32	0.72	0.72	0.26	0.35	0.35	0.3	0.3	0.86	0.86	0.86	-0.05	0.29	-0.14	1.23	-0.03	-0.11	-0.37
Percentage of IncomeLossFromContinuingOperationsPerBasicShare	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

Income Loss From Continuing Operations Per Diluted Share

us-gaap:IncomeLossFromContinuingOperationsPerDilutedShare

Period End	2020-04-30	2020-01-31	2020-01-25	2019-10-31	2019-10-26	2019-07-31	2019-07-27	2019-04-30	2019-01-31	2019-01-26	2018-10-31	2018-10-27	2018-07-31	2018-07-28	2018-04-30	2018-01-27	2017-10-28	2017-07-29	2017-04-30	2017-01-28	2016-10-29	2016-07-30
Value	0.73	-0.04	-0.04	0.31	0.31	0.71	0.71	0.26	0.35	0.35	0.29	0.29	0.85	0.85	0.85	-0.05	0.28	-0.14	1.21	-0.03	-0.11	-0.37
Percentage of IncomeLossFromContinuingOperationsPerDilutedShare	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

Revenue From Contract With Customer Including Assessed Tax

us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax

Period End	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30	2018-01-27	2017-10-28	2017-07-29	2017-04-30	2017-01-28	2016-10-29	2016-07-30
Value	135	61	83	86	87	75	72	78	87	75	72	78	113	54	65	34
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Revenues	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	74.9	117.8	98.9	178.3	90.6	102.8	131.3	94.9

us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:BalanceSheetLocation

avav:ContractLiability

Period End	2020-10-31	2020-08-01	2020-04-30	2020-01-25	2019-10-26	2019-07-27	2019-04-30	2019-01-26	2018-10-27	2018-07-28	2018-04-30	2018-01-27	2017-10-28
Value	3.451	1.973	0.0	0.012	0.828	0.83	0.0	0.01	0.006	1.548	0.0	0.062	0.0
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.1	0.0
Percentage of Revenues	3.7	2.3	0.0	0.0	1.0	1.0	0.0	0.0	0.0	2.0	0.0	0.1	0.0
Percentage of Revenues avav:ContractLiability	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0

us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:ContractWithCustomerBasisOfPricing

avav:Cpff

Period End	2020-10-31	2020-08-01	2020-04-30	2020-01-25	2019-10-26	2019-07-27	2019-04-30	2019-01-26	2018-10-27	2018-07-28	2018-04-30	2018-01-27	2017-10-28	2017-07-29
Value	24	26	33	20	21	18	24	22	22	19	25	12	8.948	8.373
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax	0.0	0.0	25.0	0.0	0.0	0.0	27.6	0.0	0.0	0.0	28.5	17.1	12.3	10.7
Percentage of Revenues	26.1	30.4	0.0	33.7	25.5	21.0	0.0	29.7	31.3	25.6	21.3	20.1	12.1	19.1
Percentage of Revenues avav:Cpff	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0

avav:Ffp

Period End	2020-10-31	2020-08-01	2020-04-30	2020-01-25	2019-10-26	2019-07-27	2019-04-30	2019-01-26	2018-10-27	2018-07-28	2018-04-30	2018-01-27	2017-10-28	2017-07-29
Value	68	60	101	40	60	67	63	52	50	58	88	41	56	25
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax	0.0	0.0	74.9	0.0	0.0	0.0	71.9	0.0	0.0	0.0	100.8	55.4	77.8	33.1
Percentage of Revenues	73.8	69.6	0.0	64.9	72.7	78.2	0.0	70.1	68.6	74.3	75.5	65.3	76.9	59.1
Percentage of Revenues avav:Ffp	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0

avav:TM

Period End	2020-10-31	2020-08-01	2020-04-30	2020-01-25	2019-10-26	2019-07-27	2019-04-30	2019-01-26	2018-10-27	2018-07-28	2018-04-30	2018-01-27	2017-10-28	2017-07-29
Value	0.01	0.006	0.121	0.883	1.496	0.703	0.468	0.119	0.055	0.057	0.007	0.012	0.092	0.134
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax	0.0	0.0	0.1	0.0	0.0	0.0	0.5	0.0	0.0	0.0	0.0	0.0	0.1	0.2
Percentage of Revenues	0.0	0.0	0.0	1.4	1.8	0.8	0.0	0.2	0.1	0.1	0.0	0.0	0.1	0.3
Percentage of Revenues avav:TM	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0

us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:MajorCustomers

avav:NonU.s.Government

Period End	2020-10-31	2020-08-01	2020-04-30	2020-01-25	2019-10-26	2019-07-27	2019-04-30	2019-01-26	2018-10-27	2018-07-28	2018-04-30	2018-01-27	2017-10-28	2017-07-29
Value	37	33	34	36	32	37	40	22	26	42	51	23	25	11
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax	0.0	0.0	25.8	0.0	0.0	0.0	46.1	0.0	0.0	0.0	58.1	31.3	34.6	14.7
Percentage of Revenues	40.0	38.5	0.0	58.7	39.6	43.5	0.0	30.5	35.7	54.0	43.6	36.9	34.2	26.2
Percentage of Revenues avav:NonU.s.Government	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0

avav:USGovernment

Period End	2020-10-31	2020-08-01	2020-04-30	2020-01-25	2019-10-26	2019-07-27	2019-04-30	2019-01-26	2018-10-27	2018-07-28
Value	55	53	100	25	50	49	47	52	46	35
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax	0.0	0.0	74.2	0.0	0.0	0.0	53.9	0.0	0.0	0.0
Percentage of Revenues	60.0	61.5	0.0	41.3	60.4	56.5	0.0	69.5	64.3	46.0
Percentage of Revenues avav:USGovernment	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0

us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:ProductOrService

avav:Haps

Period End	2020-10-31	2020-08-01	2020-04-30	2020-01-25	2019-10-26	2019-07-27	2019-04-30	2019-01-26	2018-10-27	2018-07-28	2018-04-30	2018-01-27	2017-10-28	2017-07-29
Value	11	16	23	11	13	12	17	13	12	11	14	5.42	7.071	2.551
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax	0.0	0.0	17.3	0.0	0.0	0.0	19.8	0.0	0.0	0.0	16.5	7.2	9.7	3.3
Percentage of Revenues	12.4	18.7	0.0	19.0	16.1	14.2	0.0	18.0	17.6	14.8	12.4	8.5	9.6	5.8
Percentage of Revenues avav:Haps	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0

avav:Other

Period End	2020-10-31	2020-08-01	2020-04-30	2020-01-25	2019-10-26	2019-07-27	2019-04-30	2019-01-26	2018-10-27	2018-07-28	2018-04-30	2018-01-27	2017-10-28	2017-07-29
Value	3.987	5.328	6.467	5.256	2.797	2.244	2.434	2.762	2.929	2.498	2.282	1.082	2.343	2.184
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax	0.0	0.0	4.8	0.0	0.0	0.0	2.8	0.0	0.0	0.0	2.6	1.4	3.2	2.8
Percentage of Revenues	4.3	6.1	0.0	8.5	3.4	2.6	0.0	3.7	4.0	3.2	1.9	1.7	3.2	5.0
Percentage of Revenues avav:Other	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0

avav:SmallUas

Period End	2020-10-31	2020-08-01	2020-04-30	2020-01-25	2019-10-26	2019-07-27	2019-04-30	2019-01-26	2018-10-27	2018-07-28	2018-04-30	2018-01-27	2017-10-28	2017-07-29
Value	58	56	63	36	59	66	52	47	42	41	68	31	47	20
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax	0.0	0.0	46.6	0.0	0.0	0.0	59.2	0.0	0.0	0.0	78.2	42.1	64.4	25.7
Percentage of Revenues	62.9	64.3	0.0	59.7	71.0	76.8	0.0	63.3	57.8	52.8	58.6	49.6	63.7	45.8
Percentage of Revenues avav:SmallUas	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0

avav:Tms

Period End	2020-10-31	2020-08-01	2020-04-30	2020-01-25	2019-10-26	2019-07-27	2019-04-30	2019-01-26	2018-10-27	2018-07-28	2018-04-30	2018-01-27	2017-10-28	2017-07-29
Value	18	9.534	42	7.908	7.924	5.587	16	11	15	22	28	16	9.366	9.565
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax	0.0	0.0	31.3	0.0	0.0	0.0	18.2	0.0	0.0	0.0	31.9	21.8	12.8	12.3
Percentage of Revenues	20.5	10.9	0.0	12.8	9.5	6.4	0.0	15.0	20.6	29.2	23.9	25.7	12.7	21.9
Percentage of Revenues avav:Tms	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0

us-gaap:Product

Period End	2020-10-31	2020-08-01	2020-04-30	2020-01-25	2019-10-26	2019-07-27	2019-04-30	2019-01-26	2018-10-27	2018-07-28	2018-04-30	2018-01-27	2017-10-28	2017-07-29
Value	65	58	97	36	57	65	59	50	47	55	85	39	48	18
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax	0.0	0.0	71.8	0.0	0.0	0.0	67.9	0.0	0.0	0.0	96.7	52.4	66.3	24.1
Percentage of Revenues	70.7	66.7	0.0	58.9	68.9	75.8	0.0	66.4	64.5	70.9	72.5	61.7	65.6	42.9
Percentage of Revenues us-gaap:Product	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0

us-gaap:Service

Period End	2020-10-31	2020-08-01	2020-04-30	2020-01-25	2019-10-26	2019-07-27	2019-04-30	2019-01-26	2018-10-27	2018-07-28	2018-04-30	2018-01-27	2017-10-28
Value	27	29	38	25	25	21	28	25	25	22	28	15	17
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax	0.0	0.0	28.2	0.0	0.0	0.0	32.1	0.0	0.0	0.0	32.5	20.2	23.8
Percentage of Revenues	29.3	33.3	0.0	41.1	31.1	24.2	0.0	33.6	35.5	29.1	24.3	23.8	23.5
Percentage of Revenues us-gaap:Service	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0

us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:StatementGeographical

avav:GeographicDistributionInternational

Period End	2020-10-31	2020-08-01	2020-04-30	2020-01-25	2019-10-26	2019-07-27	2019-04-30	2019-01-26	2018-10-27	2018-07-28	2018-04-30	2018-01-27	2017-10-28	2017-07-29
Value	46	34	50	34	33	48	53	40	26	42	61	25	26	12
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax	0.0	0.0	37.4	0.0	0.0	0.0	60.6	0.0	0.0	0.0	69.4	34.2	36.5	16.4
Percentage of Revenues	49.9	38.9	0.0	55.4	40.0	55.3	0.0	54.3	36.0	54.7	52.0	40.3	36.1	29.2
Percentage of Revenues avav:GeographicDistributionInternational	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0

us-gaap:GeographicDistributionDomestic

Period End	2020-10-31	2020-08-01	2020-04-30	2020-01-25	2019-10-26	2019-07-27	2019-04-30	2019-01-26	2018-10-27	2018-07-28	2018-04-30	2018-01-27	2017-10-28	2017-07-29
Value	46	53	84	27	49	38	34	34	46	35	52	28	39	21
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax	0.0	0.0	62.6	0.0	0.0	0.0	39.4	0.0	0.0	0.0	59.8	38.3	53.7	27.6
Percentage of Revenues	50.1	61.1	0.0	44.6	60.0	44.7	0.0	45.7	64.0	45.3	44.8	45.1	53.1	49.3
Percentage of Revenues us-gaap:GeographicDistributionDomestic	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0

Revenues

us-gaap:Revenues

Period End	2020-10-31	2020-08-01	2020-01-25	2019-10-26	2019-07-27	2019-01-26	2018-10-27	2018-07-28	2018-04-30	2018-01-27	2017-10-28	2017-07-29	2017-04-30	2017-01-28	2016-10-29	2016-07-30	2016-04-30	2016-01-30	2015-10-31	2015-08-01	2015-04-30	2015-01-31	2014-11-01	2014-08-02	2014-04-30	2014-01-25	2013-10-26	2013-07-27	2013-04-30	2013-01-26	2012-10-27	2012-07-28	2012-04-30	2012-01-28	2011-10-29	2011-07-30	2011-04-30	2011-01-29	2010-10-30	2010-07-31
Value	92	87	61	83	86	75	72	78	117	63	73	43	125	53	50	36	84	67	64	47	86	68	52	51	73	69	64	44	54	47	80	58	110	71	80	61	106	84	63	38
Percentage of Revenues	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Revenues	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

Cost Of Revenue

us-gaap:CostOfRevenue

Period End	2020-10-31	2020-08-01	2020-04-30	2020-01-25	2019-10-26	2019-07-27	2019-04-30	2019-01-26	2018-10-27	2018-07-28	2018-04-30	2018-01-27	2017-10-28	2017-07-29	2017-04-30	2017-01-28	2016-10-29	2016-07-30	2016-04-30	2016-01-30	2015-10-31	2015-08-01	2015-04-30	2015-01-31	2014-11-01	2014-08-02	2014-04-30	2014-01-25	2013-10-26	2013-07-27	2013-04-30	2013-01-26	2012-10-27	2012-07-28	2012-04-30	2012-01-28	2011-10-29	2011-07-30	2011-04-30	2011-01-29	2010-10-30	2010-07-31
Value	51	52	82	38	48	45	50	44	44	45	43	43	42	32	66	33	32	29	46	40	33	31	41	41	34	37	43	42	40	31	36	27	44	39	61	44	49	40	56	50	42	26
Percentage of CostOfRevenue	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Revenues	55.9	59.5	0.0	62.0	57.8	52.5	0.0	59.7	61.1	58.2	37.4	67.8	58.0	73.4	53.2	63.6	65.2	81.5	55.3	60.6	51.3	65.9	47.6	60.5	66.1	72.9	59.0	60.9	63.2	71.6	67.2	58.2	55.6	66.8	55.2	61.9	61.9	65.0	53.6	59.6	65.9	68.5

Cost Of Goods And Services Sold

us-gaap:CostOfGoodsAndServicesSold

Period End	2020-10-31	2020-08-01	2020-04-30	2020-01-25	2019-10-26	2019-07-27	2019-04-30	2019-01-26	2018-10-27	2018-07-28	2018-04-30	2018-01-27	2017-10-28	2017-07-29	2017-04-30	2017-01-28	2016-10-29	2016-07-30	2016-04-30	2016-01-30	2015-10-31	2015-08-01	2015-04-30	2015-01-31	2014-11-01	2014-08-02	2014-04-30	2014-01-25	2013-10-26	2013-07-27	2013-04-30	2013-01-26	2012-10-27	2012-07-28	2012-04-30	2012-01-28	2011-10-29	2011-07-30	2011-04-30	2011-01-29	2010-10-30	2010-07-31
Value	51	52	82	38	48	45	50	44	44	45	63	36	35	25	40	33	32	29	46	40	33	31	41	41	34	37	43	42	40	31	36	27	44	39	61	44	49	40	56	50	42	26
Percentage of CostOfGoodsAndServicesSold	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Revenues	55.9	59.5	0.0	62.0	57.8	52.5	0.0	59.7	61.1	58.2	53.7	56.9	48.3	58.6	32.1	63.6	65.2	81.5	55.3	60.6	51.3	65.9	47.6	60.5	66.1	72.9	59.0	60.9	63.2	71.6	67.2	58.2	55.6	66.8	55.2	61.9	61.9	65.0	53.6	59.6	65.9	68.5

us-gaap:CostOfGoodsAndServicesSold us-gaap:ProductOrService

us-gaap:Product

Period End	2020-10-31	2020-08-01	2020-04-30	2020-01-25	2019-10-26	2019-07-27	2019-04-30	2019-01-26	2018-10-27	2018-07-28	2018-04-30	2018-01-27	2017-10-28	2017-07-29
Value	34	32	56	21	30	30	30	26	26	29	43	24	25	15
Percentage of CostOfGoodsAndServicesSold	66.0	61.7	69.3	54.8	64.0	66.6	59.6	59.6	59.6	65.6	68.8	68.4	70.7	62.2
Percentage of Revenues	36.9	36.7	0.0	34.0	37.0	35.0	0.0	35.6	36.4	38.2	36.9	38.9	34.1	36.5
Percentage of Revenues us-gaap:Product	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0

us-gaap:Service

Period End	2020-10-31	2020-08-01	2020-04-30	2020-01-25	2019-10-26	2019-07-27	2019-04-30	2019-01-26	2018-10-27	2018-07-28	2018-04-30	2018-01-27	2017-10-28
Value	17	19	25	17	17	15	20	18	18	15	19	11	10
Percentage of CostOfGoodsAndServicesSold	34.0	38.3	30.7	45.2	36.0	33.4	40.4	40.4	40.4	34.4	31.2	31.6	29.3
Percentage of Revenues	19.0	22.8	0.0	28.1	20.8	17.5	0.0	24.1	24.7	20.0	16.8	18.0	14.2
Percentage of Revenues us-gaap:Service	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0

Gross Profit

us-gaap:GrossProfit

Period End	2020-10-31	2020-08-01	2020-04-30	2020-01-31	2020-01-25	2019-10-31	2019-10-26	2019-07-31	2019-07-27	2019-04-30	2019-01-31	2019-01-26	2018-10-31	2018-10-27	2018-07-31	2018-07-28	2018-04-30	2018-01-27	2017-10-28	2017-07-29	2017-04-30	2017-01-28	2016-10-29	2016-07-30	2016-04-30	2016-01-30	2015-10-31	2015-08-01	2015-04-30	2015-01-31	2014-11-01	2014-08-02	2014-04-30	2014-01-25	2013-10-26	2013-07-27	2013-04-30	2013-01-26	2012-10-27	2012-07-28	2012-04-30	2012-01-28	2011-10-29	2011-07-30	2011-04-30	2011-01-29	2010-10-30	2010-07-31
Value	40	35	53	23	23	35	35	41	41	37	30	30	28	28	32	32	52	20	31	11	58	19	17	6.683	37	26	31	16	45	26	17	14	30	27	23	12	17	19	35	19	49	27	30	21	49	34	21	12
Percentage of GrossProfit	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Revenues	44.1	40.5	0.0	0.0	38.0	0.0	42.2	0.0	47.5	0.0	0.0	40.3	0.0	38.9	0.0	41.8	44.5	32.2	42.0	26.6	46.8	36.4	34.8	18.5	44.7	39.4	48.7	34.1	52.4	39.5	33.9	27.1	41.0	39.1	36.8	28.4	32.8	41.8	44.4	33.2	44.8	38.1	38.1	35.0	46.4	40.4	34.1	31.5

us-gaap:GrossProfit us-gaap:ProductOrService

us-gaap:Product

Period End	2020-10-31	2020-08-01	2020-04-30	2020-01-25	2019-10-26	2019-07-27	2019-04-30	2019-01-26	2018-10-27	2018-07-28	2018-04-30	2018-01-27	2017-10-28	2017-07-29
Value	31	26	40	15	26	35	29	23	20	25	41	14	23	2.808
Percentage of GrossProfit	76.7	74.2	75.6	65.5	75.6	85.8	79.3	76.5	72.1	78.3	79.9	70.8	74.9	24.1
Percentage of Revenues	33.8	30.0	0.0	24.9	31.9	40.8	0.0	30.9	28.1	32.7	35.5	22.8	31.5	6.4
Percentage of Revenues us-gaap:Product	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0

us-gaap:Service

Period End	2020-10-31	2020-08-01	2020-04-30	2020-01-25	2019-10-26	2019-07-27	2019-04-30	2019-01-26	2018-10-27	2018-07-28	2018-04-30	2018-01-27	2017-10-28
Value	9.532	9.138	12	8.098	8.582	5.841	7.658	7.148	7.91	7.087	8.884	3.673	6.919
Percentage of GrossProfit	23.3	25.8	24.4	34.5	24.4	14.2	20.7	23.5	27.9	21.7	17.0	17.8	22.3
Percentage of Revenues	10.3	10.4	0.0	13.1	10.3	6.7	0.0	9.5	10.8	9.1	7.6	5.7	9.4
Percentage of Revenues us-gaap:Service	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0

Research And Development Expense

us-gaap:ResearchAndDevelopmentExpense

Period End	2020-10-31	2020-08-01	2020-04-30	2020-01-25	2019-10-26	2019-07-27	2019-04-30	2019-01-26	2018-10-27	2018-07-28	2018-04-30	2018-01-27	2017-10-28	2017-07-29	2017-04-30	2017-01-28	2016-10-29	2016-07-30	2016-04-30	2016-01-30	2015-10-31	2015-08-01	2015-04-30	2015-01-31	2014-11-01	2014-08-02	2014-04-30	2014-01-25	2013-10-26	2013-07-27	2013-04-30	2013-01-26	2012-10-27	2012-07-28	2012-04-30	2012-01-28	2011-10-29	2011-07-30	2011-04-30	2011-01-29	2010-10-30	2010-07-31
Value	11	11	15	11	10	8.709	11	8.087	8.109	6.435	5.386	7.314	7.272	6.461	7.937	7.988	8.517	8.6	14	8.247	9.897	9.831	22	8.577	8.531	7.124	6.223	5.241	6.861	7.19	9.386	10	9.386	8.136	7.337	7.238	8.816	7.586	11	7.872	8.689	7.972
Percentage of ResearchAndDevelopmentExpense	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Revenues	12.9	12.7	0.0	18.4	13.0	10.0	0.0	10.7	11.1	8.2	4.6	11.4	9.9	14.8	6.3	15.0	17.0	23.7	16.9	12.2	15.3	20.9	25.7	12.5	16.2	13.7	8.5	7.6	10.6	16.3	17.3	21.9	11.7	13.9	6.6	10.1	11.0	12.2	10.6	9.3	13.6	20.9

Selling General And Administrative Expense

us-gaap:SellingGeneralAndAdministrativeExpense

Period End	2020-10-31	2020-08-01	2020-04-30	2020-01-25	2019-10-26	2019-07-27	2019-04-30	2019-01-26	2018-10-27	2018-07-28	2018-04-30	2018-01-27	2017-10-28	2017-07-29	2017-04-30	2017-01-28	2016-10-29	2016-07-30	2016-04-30	2016-01-30	2015-10-31	2015-08-01	2015-04-30	2015-01-31	2014-11-01	2014-08-02	2014-04-30	2014-01-25	2013-10-26	2013-07-27	2013-04-30	2013-01-26	2012-10-27	2012-07-28	2012-04-30	2012-01-28	2011-10-29	2011-07-30	2011-04-30	2011-01-29	2010-10-30	2010-07-31
Value	14	12	16	13	16	13	20	14	13	11	9.531	13	14	13	16	12	13	13	16	13	14	15	15	13	13	13	16	13	13	12	14	10	13	13	16	12	12	13	12	10	12	11
Percentage of SellingGeneralAndAdministrativeExpense	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Revenues	16.2	13.7	0.0	21.4	19.5	15.7	0.0	19.2	18.7	15.3	8.1	21.1	19.6	30.5	13.3	24.1	26.7	37.7	19.8	19.7	22.8	32.4	18.1	19.4	25.6	25.8	23.1	19.0	20.2	28.2	26.4	22.2	16.4	23.2	14.9	17.9	15.2	22.1	12.1	12.5	19.9	29.7

Operating Income Loss

us-gaap:OperatingIncomeLoss

Period End	2020-10-31	2020-08-01	2020-04-30	2020-01-25	2019-10-26	2019-07-27	2019-04-30	2019-01-26	2018-10-27	2018-07-28	2018-04-30	2018-01-27	2017-10-28	2017-07-29	2017-04-30	2017-01-28	2016-10-29	2016-07-30	2016-04-30	2016-01-30	2015-10-31	2015-08-01	2015-04-30	2015-01-31	2014-11-01	2014-08-02	2014-04-30	2014-01-25	2013-10-26	2013-07-27	2013-04-30	2013-01-26	2012-10-27	2012-07-28	2012-04-30	2012-01-28	2011-10-29	2011-07-30	2011-04-30	2011-01-29	2010-10-30	2010-07-31
Value	13	12	21	-1.108	8.053	18	5.143	7.841	6.644	14	30	-0.228	9.264	-8.162	34	-1.425	-4.487	-15.58	6.831	5.065	6.903	-9.064	7.469	5.148	-4.13	-6.473	6.947	8.643	3.933	-7.104	-5.954	-1.066	13	-2.252	25	7.329	9.574	0.429	25	15	0.401	-7.307
Percentage of OperatingIncomeLoss	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Revenues	15.0	14.1	0.0	-1.8	9.7	21.7	0.0	10.4	9.1	18.2	26.2	-0.4	12.5	-18.7	27.1	-2.7	-9.0	-43.0	8.1	7.5	10.7	-19.3	8.6	7.5	-7.8	-12.5	9.5	12.5	6.1	-16.1	-11.0	-2.3	16.3	-3.8	23.3	10.2	11.9	0.7	23.7	18.6	0.6	-19.1

Other Nonoperating Income Expense

us-gaap:OtherNonoperatingIncomeExpense

Period End	2020-10-31	2020-08-01	2020-04-30	2020-01-25	2019-10-26	2019-07-27	2019-04-30	2019-01-26	2018-10-27	2018-07-28	2018-04-30	2018-01-27	2017-10-28	2017-07-29	2017-04-30	2017-01-28	2016-10-29	2016-07-30	2016-04-30	2016-01-30	2015-10-31	2015-08-01	2015-04-30	2015-01-31	2014-11-01	2014-08-02	2014-04-30	2014-01-25	2013-10-26	2013-07-27	2013-04-30	2013-01-26
Value	0.072	0.033	0.075	0.12	0.157	0.355	1.339	0.962	1.291	8.388	0.11	-0.108	-0.055	0.004	0.536	-0.046	-0.13	-0.3	0.097	-0.215	-0.192	-2.389	-0.727	-0.284	-0.583	0.591	2.648	4.675	-2.307	-3.394	6.196	0.049
Percentage of OtherNonoperatingIncomeExpense	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Revenues	0.1	0.0	0.0	0.2	0.2	0.4	0.0	1.3	1.8	10.7	0.1	-0.2	-0.1	0.0	0.4	-0.1	-0.3	-0.8	0.1	-0.3	-0.3	-5.1	-0.8	-0.4	-1.1	1.1	3.6	6.8	-3.6	-7.7	11.5	0.1

Allocated Share Based Compensation Expense

us-gaap:AllocatedShareBasedCompensationExpense

Period End	2020-04-30	2020-01-25	2019-10-26	2019-07-27	2019-04-30
Value	6227000.0	-1736000.0	136000.0	1600000.0	5156000.0
Percentage of AllocatedShareBasedCompensationExpense	100.0	100.0	100.0	100.0	100.0
Percentage of Revenues	0.0	-2.8	0.2	1.8	0.0

us-gaap:AllocatedShareBasedCompensationExpense us-gaap:AwardType, us-gaap:PlanName

us-gaap:PerformanceShares, avav:Fiscal2018Ltip

Period End	2020-04-30	2020-01-25	2019-10-26	2019-07-27	2019-04-30	2019-01-26	2018-10-27	2018-07-28	2018-04-30	2018-01-27	2017-10-28	2017-07-29
Value	31000.0	201000.0	46000.0	8000.0	-65000.0	317000.0	113000.0	490000.0	269000.0	0	0	0
Percentage of AllocatedShareBasedCompensationExpense	0.5	-11.6	33.8	0.5	-1.3	0.0	0.0	0.0	0.0	0.0	0.0	0.0
Percentage of Revenues	0.0	0.3	0.1	0.0	0.0	0.4	0.2	0.6	0.2	0.0	0.0	0.0
Percentage of Revenues us-gaap:PerformanceShares avav:Fiscal2018Ltip	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0

us-gaap:PerformanceShares, avav:Fiscal2019Ltip

Period End	2020-10-31	2020-08-01	2020-04-30	2020-01-25	2019-10-26	2019-07-27	2019-04-30	2019-01-26	2018-10-27	2018-07-28
Value	189000.0	75000.0	92000.0	246000.0	16000.0	33000.0	90000.0	22600.0	211000.0	44000.0
Percentage of AllocatedShareBasedCompensationExpense	0.0	0.0	1.5	-14.2	11.8	2.1	1.7	0.0	0.0	0.0
Percentage of Revenues	0.2	0.1	0.0	0.4	0.0	0.0	0.0	0.0	0.3	0.1
Percentage of Revenues us-gaap:PerformanceShares avav:Fiscal2019Ltip	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0

us-gaap:PerformanceShares, avav:Fiscal2020Ltip

Period End	2020-10-31	2020-08-01	2020-01-25	2019-10-26	2019-07-27
Value	264000.0	80000.0	215000.0	166000.0	131000.0
Percentage of AllocatedShareBasedCompensationExpense	0.0	0.0	-12.4	122.1	8.2
Percentage of Revenues	0.3	0.1	0.3	0.2	0.2
Percentage of Revenues us-gaap:PerformanceShares avav:Fiscal2020Ltip	0.0	0.0	0.0	0.0	0.0

us-gaap:PerformanceShares, avav:Fiscal2021Ltip

Period End	2020-10-31	2020-08-01
Value	347000.0	91000.0
Percentage of AllocatedShareBasedCompensationExpense	0.0	0.0
Percentage of Revenues	0.4	0.1
Percentage of Revenues us-gaap:PerformanceShares avav:Fiscal2021Ltip	0.0	0.0

us-gaap:AllocatedShareBasedCompensationExpense us-gaap:PlanName

avav:Fiscal2019And2020And2021Ltip

Period End	2020-10-31	2020-08-01
Value	800000.0	1853000.0
Percentage of AllocatedShareBasedCompensationExpense	0.0	0.0
Percentage of Revenues	0.9	2.1
Percentage of Revenues avav:Fiscal2019And2020And2021Ltip	0.0	0.0

us-gaap:AllocatedShareBasedCompensationExpense us-gaap:Range, us-gaap:AwardType, us-gaap:PlanName

srt:Maximum, us-gaap:PerformanceShares, avav:Fiscal2019Ltip

Period End	2020-10-31	2020-08-01	2020-04-30	2020-01-25	2019-10-26	2019-07-27	2019-04-30	2019-01-26
Value	0	2478000.0	0	0	-455000.0	2933000.0	-700000.0	0
Percentage of AllocatedShareBasedCompensationExpense	0.0	0.0	0.0	-0.0	-334.6	183.3	-13.6	0.0
Percentage of Revenues	0.0	2.8	0.0	0.0	-0.5	3.4	0.0	0.0
Percentage of Revenues srt:Maximum us-gaap:PerformanceShares avav:Fiscal2019Ltip	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0

srt:Maximum, us-gaap:PerformanceShares, avav:Fiscal2020Ltip

Period End	2020-10-31	2020-08-01	2020-01-25	2019-10-26	2019-07-27
Value	0	4263000.0	0	-433000.0	4696000.0
Percentage of AllocatedShareBasedCompensationExpense	0.0	0.0	-0.0	-318.4	293.5
Percentage of Revenues	0.0	4.9	0.0	-0.5	5.4
Percentage of Revenues srt:Maximum us-gaap:PerformanceShares avav:Fiscal2020Ltip	0.0	0.0	0.0	0.0	0.0

srt:Maximum, us-gaap:PerformanceShares, avav:Fiscal2021Ltip

Period End	2020-10-31	2020-08-01
Value	0	7946000.0
Percentage of AllocatedShareBasedCompensationExpense	0.0	0.0
Percentage of Revenues	0.0	9.1
Percentage of Revenues srt:Maximum us-gaap:PerformanceShares avav:Fiscal2021Ltip	0.0	0.0

Income Loss From Continuing Operations

us-gaap:IncomeLossFromContinuingOperations

Period End	2020-04-30	2020-01-25	2019-10-26	2019-07-27	2019-04-30	2019-01-26	2018-10-27	2018-07-28	2018-04-30	2018-01-27	2017-10-28	2017-07-29
Value	17	-1.008	7.501	17	6.097	8.431	7.047	20	19	-0.647	7.756	-4.371
Percentage of IncomeLossFromContinuingOperations	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Revenues	0.0	-1.6	9.0	19.7	0.0	11.2	9.7	26.1	16.9	-1.0	10.5	-10.0

Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments

Period End	2020-10-31	2020-08-01	2020-04-30	2020-01-25	2019-10-26	2019-07-27	2019-04-30	2019-01-26	2018-10-27	2018-07-28	2018-04-30	2018-01-27	2017-10-28	2017-07-29
Value	14	12	22	0.134	9.476	20	7.908	10	9.003	23	29	0.596	10	-7.615
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Revenues	15.2	14.3	0.0	0.2	11.4	23.7	0.0	13.4	12.3	30.1	25.5	0.9	14.8	-17.4

Income Tax Expense Benefit

us-gaap:IncomeTaxExpenseBenefit

Period End	2020-10-31	2020-08-01	2020-04-30	2020-01-25	2019-10-26	2019-07-27	2019-04-30	2019-01-26	2018-10-27	2018-07-28	2018-04-30	2018-01-27	2017-10-28	2017-07-29	2017-04-30	2017-01-28	2016-10-29	2016-07-30	2016-04-30	2016-01-30	2015-10-31	2015-08-01	2015-04-30	2015-01-31	2014-11-01	2014-08-02	2014-04-30	2014-01-25	2013-10-26	2013-07-27	2013-04-30	2013-01-26	2012-10-27	2012-07-28	2012-04-30	2012-01-28	2011-10-29	2011-07-30	2011-04-30	2011-01-29	2010-10-30	2010-07-31
Value	2.491	1.207	2.645	-0.038	1.108	2.133	-0.083	0.946	1.211	2.567	9.9	0.628	2.829	-3.18	4.561	1.102	-0.048	-3.863	1.923	-1.133	2.56	-4.248	-0.085	2.763	-1.619	-2.061	1.796	2.299	0.166	-3.083	1.265	-4.722	4.498	-0.694	8.099	1.714	3.093	0.181	7.604	4.274	0.184	-3.743
Percentage of IncomeTaxExpenseBenefit	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Revenues	2.7	1.4	0.0	-0.1	1.3	2.5	0.0	1.3	1.7	3.3	8.4	1.0	3.8	-7.3	3.6	2.1	-0.1	-10.7	2.3	-1.7	4.0	-9.0	-0.1	4.0	-3.1	-4.0	2.4	3.3	0.3	-7.0	2.3	-10.0	5.6	-1.2	7.3	2.4	3.8	0.3	7.2	5.1	0.3	-9.8

Income Taxes Paid Net

us-gaap:IncomeTaxesPaidNet

Period End	2020-10-31	2020-08-01	2020-01-25	2019-10-26	2019-07-27	2019-01-26	2018-10-27	2018-07-28
Value	2354000.0	10000.0	0	224000.0	294000.0	1507000.0	5277000.0	-7000.0
Percentage of IncomeTaxesPaidNet	100.0	100.0	0.0	100.0	100.0	100.0	100.0	100.0
Percentage of Revenues	2.5	0.0	0.0	0.3	0.3	2.0	7.2	-0.0

Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest

us-gaap:IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest

Period End	2020-10-31	2020-08-01	2020-04-30	2020-01-25	2019-10-26	2019-07-27	2019-04-30	2019-01-26	2018-10-27	2018-07-28	2018-04-30	2018-01-27	2017-10-28	2017-07-29
Value	2.072	10	17	-1.028	7.505	17	6.118	8.412	7.04	20	19	-0.656	7.55	-4.394
Percentage of IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Revenues	2.2	11.5	0.0	-1.7	9.0	19.7	0.0	11.2	9.6	26.0	16.9	-1.0	10.2	-10.0

Profit Loss

us-gaap:ProfitLoss

Period End	2020-10-31	2020-08-01	2020-04-30	2020-01-25	2019-10-26	2019-07-27	2019-04-30	2019-01-26	2018-10-27	2018-07-28	2018-04-30	2018-01-27	2017-10-28	2017-07-29	2017-04-30	2017-01-28	2016-10-29	2016-07-30	2011-07-30	2010-07-31
Value	2.072	10	17	-1.028	7.505	17	5.703	8.35	6.05	27	18	-0.837	6.812	-4.466	30	-2.183	-4.172	-11.642	0.326	-3.443
Percentage of ProfitLoss	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Revenues	2.2	11.5	0.0	-1.7	9.0	19.7	0.0	11.1	8.3	35.0	15.6	-1.3	9.2	-10.2	24.3	-4.1	-8.3	-32.1	0.5	-9.0

us-gaap:ProfitLoss us-gaap:StatementEquityComponents

us-gaap:NoncontrollingInterest

Period End	2020-08-01	2020-01-25	2019-10-26	2019-07-27	2019-01-26	2018-10-27
Value	-0.037	-0.02	0.004	-0.011	-0.019	-0.007
Percentage of ProfitLoss	-0.4	1.9	0.1	-0.1	-0.2	-0.1
Percentage of Revenues	-0.0	-0.0	0.0	-0.0	-0.0	-0.0
Percentage of Revenues us-gaap:NoncontrollingInterest	0.0	0.0	0.0	0.0	0.0	0.0

us-gaap:Parent

Period End	2020-08-01	2020-01-25	2019-10-26	2019-07-27	2019-01-26	2018-10-27
Value	10	-1.008	7.501	17	8.369	6.057
Percentage of ProfitLoss	100.4	98.1	99.9	100.1	100.2	100.1
Percentage of Revenues	11.5	-1.6	9.0	19.7	11.1	8.3
Percentage of Revenues us-gaap:Parent	0.0	0.0	0.0	0.0	0.0	0.0

us-gaap:RetainedEarnings

Period End	2020-10-31	2020-08-01	2020-01-25	2019-10-26	2019-07-27	2019-01-26	2018-10-27	2018-07-28
Value	2.094	10	-1.008	7.501	17	8.369	6.057	27
Percentage of ProfitLoss	101.1	100.4	98.1	99.9	100.1	100.2	100.1	100.1
Percentage of Revenues	2.3	11.5	-1.6	9.0	19.7	11.1	8.3	35.0
Percentage of Revenues us-gaap:RetainedEarnings	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0

Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest

us-gaap:ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest

Period End	2020-10-31	2020-08-01	2020-04-30	2020-01-25	2019-10-26	2019-07-27	2019-04-30	2019-01-26	2018-10-27	2018-07-28	2018-04-30	2018-01-27	2017-10-28	2017-07-29
Value	-22000.0	-37000.0	23000.0	-20000.0	4000.0	-11000.0	21000.0	-19000.0	-7000.0	-14000.0	22000.0	-9000.0	-206000.0	-23000.0
Percentage of ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Revenues	-0.0	-0.0	0.0	-0.0	0.0	-0.0	0.0	-0.0	-0.0	-0.0	0.0	-0.0	-0.3	-0.1

Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest

us-gaap:ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest

Period End	2020-10-31	2020-08-01	2020-04-30	2020-01-25	2019-10-26	2019-07-27	2019-04-30	2019-01-26	2018-10-27	2018-07-28	2018-04-30	2018-01-27	2017-10-28	2017-07-29	2017-04-30	2017-01-28	2016-10-29	2016-07-30
Value	2.063	10	17	-1.14	7.515	17	5.68	8.368	6.046	27	18	-0.753	7.044	-4.441	30	-2.194	-4.147	-11.624
Percentage of ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Revenues	2.2	11.5	0.0	-1.8	9.0	19.9	0.0	11.1	8.3	35.1	15.6	-1.2	9.5	-10.1	24.3	-4.1	-8.3	-32.1

Comprehensive Income Net Of Tax

us-gaap:ComprehensiveIncomeNetOfTax

Period End	2020-10-31	2020-08-01	2020-04-30	2020-01-25	2019-10-26	2019-07-27	2019-04-30	2019-01-26	2018-10-27	2018-07-28	2013-01-26	2012-10-27	2012-07-28	2012-04-30	2012-01-28	2011-10-29	2011-07-30
Value	2.085	10	17	-1.12	7.511	17	5.68	8.368	6.046	27	3.884	8.728	-1.349	17	5.788	6.628	0.328
Percentage of ComprehensiveIncomeNetOfTax	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Revenues	2.3	11.6	0.0	-1.8	9.0	19.9	0.0	11.1	8.3	35.1	8.2	10.9	-2.3	16.1	8.0	8.2	0.5

Net Income Loss Available To Common Stockholders Basic

us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic

Period End	2020-10-31	2020-08-01	2020-04-30	2020-01-25	2019-10-26	2019-07-27	2019-04-30	2019-01-26	2018-10-27	2018-07-28	2018-04-30	2018-01-27	2017-10-28	2017-07-29	2017-04-30	2017-01-28	2016-10-29	2016-07-30	2016-04-30	2016-01-30	2015-10-31	2015-08-01	2015-04-30	2015-01-31	2014-11-01	2014-08-02	2014-04-30	2014-01-25	2013-10-26	2013-07-27	2013-04-30	2013-01-26	2012-10-27	2012-07-28	2012-04-30	2012-01-28	2011-10-29	2011-07-30	2011-04-30	2011-01-29	2010-10-30
Value	2.094	10	17	-1.008	7.501	17	5.682	8.369	6.057	27	18	-0.828	7.018	-4.443	30	-2.183	-4.172	-11.642	5.364	6.164	4.419	-6.981	7.08	2.325	-2.901	-3.609	8.057	11	1.655	-7.21	-0.795	3.869	8.738	-1.386	17	5.744	6.587	0.326	17	11	0.262
Percentage of NetIncomeLossAvailableToCommonStockholdersBasic	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Revenues	2.3	11.5	0.0	-1.6	9.0	19.7	0.0	11.1	8.3	35.0	15.6	-1.3	9.5	-10.2	24.3	-4.1	-8.3	-32.1	6.3	9.1	6.8	-14.8	8.2	3.4	-5.5	-7.0	11.0	16.2	2.6	-16.3	-1.5	8.2	10.9	-2.4	16.1	8.0	8.2	0.5	16.6	13.6	0.4

Assets

us-gaap:Assets

Period End	2020-10-31	2020-08-01	2020-04-30	2020-01-25	2019-10-26	2019-07-27	2019-04-30	2019-01-26	2018-10-27	2018-07-28	2018-04-30	2018-01-27	2017-10-28	2017-07-29	2017-04-30	2017-01-28	2016-10-29	2016-07-30	2016-04-30	2016-01-30	2015-10-31	2015-08-01	2015-04-30	2015-01-31	2014-11-01	2014-08-02	2014-04-30	2014-01-25	2013-10-26	2013-07-27	2013-04-30	2013-01-26	2012-10-27	2012-07-28	2012-04-30	2012-01-28	2011-10-29	2011-07-30	2011-04-30
Value	588	577	584	559	544	534	508	498	486	480	472	432	429	420	432	387	389	389	410	389	380	383	397	386	386	378	384	366	350	351	363	358	356	340	369	324	322	301	331
Percentage of Assets	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Assets	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

Liabilities And Stockholders Equity

us-gaap:LiabilitiesAndStockholdersEquity

Period End	2020-10-31	2020-08-01	2020-04-30	2020-01-25	2019-10-26	2019-07-27	2019-04-30	2019-01-26	2018-10-27	2018-07-28	2018-04-30	2018-01-27	2017-10-28	2017-07-29	2017-04-30	2017-01-28	2016-10-29	2016-07-30	2016-04-30	2016-01-30	2015-10-31	2015-08-01	2015-04-30	2015-01-31	2014-11-01	2014-08-02	2014-04-30	2014-01-25	2013-10-26	2013-07-27	2013-04-30	2013-01-26	2012-10-27	2012-07-28	2012-04-30	2012-01-28	2011-10-29	2011-07-30	2011-04-30
Value	588	577	584	559	544	534	508	498	486	480	472	432	429	420	432	387	389	389	410	389	380	383	397	386	386	378	384	366	350	351	363	358	356	340	369	324	322	301	331
Percentage of LiabilitiesAndStockholdersEquity	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Assets	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

Stockholders Equity

us-gaap:StockholdersEquity

Period End	2020-10-31	2020-08-01	2020-04-30	2020-01-25	2019-10-26	2019-07-27	2019-04-30	2019-01-26	2018-10-27	2018-07-28	2018-04-30	2018-01-27	2017-10-28	2017-07-29	2017-04-30	2017-01-28	2016-10-29	2016-07-30	2016-04-30	2016-01-30	2015-10-31	2015-08-01	2015-04-30	2015-01-31	2014-11-01	2014-08-02	2014-04-30	2014-01-25	2013-10-26	2013-07-27	2013-04-30	2013-01-26	2012-10-27	2012-07-28	2012-04-30	2012-01-28	2011-10-29	2011-04-30	2010-04-30	2009-04-30
Value	523	519	509	490	490	481	462	455	444	437	410	390	389	380	381	347	348	351	361	354	346	345	348	340	338	340	342	324	311	308	315	315	310	299	299	279	272	263	233	207
Percentage of StockholdersEquity	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Assets	89.1	90.0	87.2	87.8	90.1	90.1	90.9	91.3	91.3	91.0	86.7	90.2	90.7	90.5	88.3	89.6	89.3	90.2	88.0	91.0	91.2	90.0	87.8	88.2	87.6	90.0	89.0	88.5	88.8	87.8	86.7	87.8	87.1	87.9	81.1	86.2	84.5	79.4	0.0	0.0

us-gaap:StockholdersEquity us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome

Period End	2020-10-31	2020-08-01	2020-04-30	2020-01-25	2019-10-26	2019-07-27	2019-04-30	2019-01-26	2018-10-27	2018-07-28	2018-04-30	2017-04-30	2016-04-30	2015-04-30	2014-04-30	2013-04-30	2012-04-30	2011-04-30	2010-04-30	2009-04-30
Value	0.342	0.351	0.328	0.069	0.181	0.171	0.002	0.004	0.005	0.016	-0.021	-0.127	-0.201	-1.358	-0.263	-0.705	-0.694	-0.784	-0.76	-0.537
Percentage of StockholdersEquity	0.1	0.1	0.1	0.0	0.0	0.0	0.0	0.0	0.0	0.0	-0.0	-0.0	-0.1	-0.4	-0.1	-0.2	-0.2	-0.3	-0.3	-0.3
Percentage of Assets	0.1	0.1	0.1	0.0	0.0	0.0	0.0	0.0	0.0	0.0	-0.0	-0.0	-0.0	-0.3	-0.1	-0.2	-0.2	-0.2	0.0	0.0
Percentage of Assets us-gaap:AccumulatedOtherComprehensiveIncome	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0

us-gaap:AdditionalPaidInCapital

Period End	2020-10-31	2020-08-01	2020-04-30	2020-01-25	2019-10-26	2019-07-27	2019-04-30	2019-01-26	2018-10-27	2018-07-28	2018-04-30	2017-04-30	2016-04-30	2015-04-30	2014-04-30	2013-04-30	2012-04-30	2011-04-30	2010-04-30	2009-04-30
Value	183	181	181	180	178	177	176	174	171	170	170	162	154	148	143	130	124	119	115	110
Percentage of StockholdersEquity	35.0	34.9	35.6	36.7	36.4	36.8	38.1	38.4	38.7	39.1	41.5	42.5	42.7	42.5	41.9	41.4	41.8	45.5	49.5	53.1
Percentage of Assets	31.2	31.4	31.0	32.2	32.8	33.1	34.6	35.1	35.3	35.6	36.0	37.5	37.6	37.3	37.3	35.9	33.8	36.1	0.0	0.0
Percentage of Assets us-gaap:AdditionalPaidInCapital	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0

us-gaap:NoncontrollingInterest

Period End	2020-10-31	2020-08-01	2020-01-25	2019-10-26	2019-07-27	2019-04-30	2019-01-26	2018-10-27	2018-07-28	2018-04-30	2017-04-30
Value	-0.059	-0.037	-0.023	-0.003	-0.007	0.004	-0.017	0.002	0.009	0.023	0.239
Percentage of StockholdersEquity	-0.0	-0.0	-0.0	-0.0	-0.0	0.0	-0.0	0.0	0.0	0.0	0.1
Percentage of Assets	-0.0	-0.0	-0.0	-0.0	-0.0	0.0	-0.0	0.0	0.0	0.0	0.1
Percentage of Assets us-gaap:NoncontrollingInterest	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0

us-gaap:Parent

Period End	2020-10-31	2020-08-01	2020-04-30	2020-01-25	2019-10-26	2019-07-27	2019-04-30	2019-01-26	2018-10-27	2018-07-28	2018-04-30	2017-04-30	2016-04-30	2015-04-30
Value	523	519	509	490	490	481	462	455	444	437	410	381	361	348
Percentage of StockholdersEquity	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Assets	89.1	90.0	87.2	87.8	90.1	90.1	90.9	91.3	91.3	91.0	86.7	88.3	88.0	87.8
Percentage of Assets us-gaap:Parent	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0

us-gaap:RetainedEarnings

Period End	2020-10-31	2020-08-01	2020-04-30	2020-01-25	2019-10-26	2019-07-27	2019-04-30	2019-01-26	2018-10-27	2018-07-28	2018-04-30	2017-04-30	2016-04-30	2015-04-30	2014-04-30	2013-04-30	2012-04-30	2011-04-30	2010-04-30	2009-04-30
Value	340	338	328	310	311	304	286	280	272	266	239	219	207	201	199	185	174	144	118	97
Percentage of StockholdersEquity	64.9	65.0	64.3	63.3	63.6	63.2	61.9	61.6	61.3	60.9	58.5	57.6	57.4	57.9	58.1	58.8	58.5	54.8	50.8	47.2
Percentage of Assets	57.9	58.5	56.1	55.6	57.2	56.9	56.3	56.3	56.0	55.4	50.7	50.9	50.5	50.8	51.7	51.0	47.4	43.6	0.0	0.0
Percentage of Assets us-gaap:RetainedEarnings	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0

Assets Current

us-gaap:AssetsCurrent

Period End	2020-10-31	2020-08-01	2020-04-30	2020-01-25	2019-10-26	2019-07-27	2019-04-30	2019-01-26	2018-10-27	2018-07-28	2018-04-30	2018-01-27	2017-10-28	2017-07-29	2017-04-30	2017-01-28	2016-10-29	2016-07-30	2016-04-30	2016-01-30	2015-10-31	2015-08-01	2015-04-30	2015-01-31	2014-11-01	2014-08-02	2014-04-30	2014-01-25	2013-10-26	2013-07-27	2013-04-30	2013-01-26	2012-10-27	2012-07-28	2012-04-30	2012-01-28	2011-10-29	2011-07-30	2011-04-30
Value	507	486	503	457	456	455	469	436	421	410	399	355	357	346	354	308	313	323	349	329	321	318	329	309	311	313	306	289	265	250	263	266	263	254	281	257	271	267	298
Percentage of AssetsCurrent	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Assets	86.3	84.2	86.1	81.8	83.8	85.2	92.3	87.6	86.7	85.4	84.4	82.1	83.3	82.5	81.9	79.7	80.5	83.1	85.2	84.6	84.6	83.0	82.8	80.2	80.7	82.9	79.7	78.9	75.8	71.3	72.5	74.4	74.1	74.9	76.3	79.3	84.1	88.6	89.8

Cash And Cash Equivalents At Carrying Value

us-gaap:CashAndCashEquivalentsAtCarryingValue

Period End	2020-10-31	2020-08-01	2020-04-30	2020-01-25	2019-10-26	2019-07-27	2019-04-30	2019-01-26	2018-10-27	2018-07-28	2018-04-30	2018-01-27	2017-10-28	2017-07-29	2017-04-30	2017-01-28	2016-10-29	2016-07-30	2016-04-30	2016-01-30	2015-10-31	2015-08-01	2015-04-30	2015-01-31	2014-11-01	2014-08-02	2014-04-30	2014-01-25	2013-10-26	2013-07-27	2013-04-30	2013-01-26	2012-10-27	2012-07-28	2012-04-30	2012-01-28	2011-10-29	2011-07-30	2011-04-30	2011-01-29	2010-10-30	2010-07-31	2010-04-30	2009-04-30
Value	280	246	255	131	130	137	172	149	151	170	143	112	117	117	79	73	88	122	124	122	128	146	143	125	126	148	126	92	66	64	75	63	70	53	64	65	98	81	62	39	76	45	28	116
Percentage of CashAndCashEquivalentsAtCarryingValue	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Assets	47.6	42.7	43.6	23.5	24.0	25.6	33.9	29.9	31.1	35.6	30.3	25.9	27.3	27.9	18.5	18.9	22.8	31.4	30.3	31.5	33.7	38.2	36.1	32.6	32.7	39.1	33.0	25.3	18.8	18.3	20.7	17.8	19.9	15.6	17.4	20.3	30.5	27.0	18.7	0.0	0.0	0.0	0.0	0.0

Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

Period End	2020-10-31	2020-08-01	2020-04-30	2019-10-26	2019-07-27	2019-04-30
Value	280	246	255	135	142	172
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Assets	47.6	42.7	43.6	24.9	26.6	33.9

Short Term Investments

us-gaap:ShortTermInvestments

Period End	2020-10-31	2020-08-01	2020-04-30	2020-01-25	2019-10-26	2019-07-27	2019-04-30	2019-01-26	2018-10-27	2018-07-28	2018-04-30	2018-01-27	2017-10-28	2017-07-29	2017-04-30	2017-01-28	2016-10-29	2016-07-30	2016-04-30	2016-01-30	2015-10-31	2015-08-01	2015-04-30	2015-01-31	2014-11-01	2014-08-02	2014-04-30	2014-01-25	2013-10-26	2013-07-27	2013-04-30	2013-01-26	2012-10-27	2012-07-28	2012-04-30	2012-01-28	2011-10-29	2011-07-30	2011-04-30
Value	67	71	47	148	161	163	150	144	138	118	113	109	110	107	119	121	118	101	103	97	77	71	85	77	81	76	70	74	77	64	73	69	64	69	77	88	78	106	126
Percentage of ShortTermInvestments	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Assets	11.4	12.3	8.1	26.6	29.7	30.6	29.6	29.0	28.5	24.6	24.0	25.3	25.8	25.6	27.7	31.3	30.3	26.1	25.2	25.1	20.5	18.5	21.5	20.1	21.0	20.3	18.3	20.4	22.1	18.3	20.2	19.5	18.2	20.4	20.9	27.3	24.4	35.5	38.2

us-gaap:ShortTermInvestments us-gaap:FinancialInstrument, us-gaap:InvestmentType

us-gaap:CorporateBondSecurities, us-gaap:AvailableforsaleSecurities

Period End	2020-10-31	2020-04-30
Value	9.834	8.492
Percentage of ShortTermInvestments	14.6	17.9
Percentage of Assets	1.7	1.5
Percentage of Assets us-gaap:CorporateBondSecurities us-gaap:AvailableforsaleSecurities	0.0	0.0

us-gaap:MunicipalBonds, us-gaap:AvailableforsaleSecurities

Period End	2020-10-31	2020-08-01	2020-04-30
Value	13	1.348	5.244
Percentage of ShortTermInvestments	19.8	1.9	11.0
Percentage of Assets	2.3	0.2	0.9
Percentage of Assets us-gaap:MunicipalBonds us-gaap:AvailableforsaleSecurities	0.0	0.0	0.0

us-gaap:USGovernmentDebtSecurities, us-gaap:AvailableforsaleSecurities

Period End	2020-10-31	2020-08-01	2020-04-30
Value	44	69	33
Percentage of ShortTermInvestments	65.6	98.1	71.1
Percentage of Assets	7.5	12.1	5.8
Percentage of Assets us-gaap:USGovernmentDebtSecurities us-gaap:AvailableforsaleSecurities	0.0	0.0	0.0

us-gaap:ShortTermInvestments us-gaap:InvestmentType

us-gaap:AvailableforsaleSecurities

Period End	2020-10-31	2020-08-01	2020-04-30	2020-01-25	2015-04-30
Value	67	71	47	13	1.473
Percentage of ShortTermInvestments	100.0	100.0	100.0	8.9	1.7
Percentage of Assets	11.4	12.3	8.1	2.4	0.4
Percentage of Assets us-gaap:AvailableforsaleSecurities	0.0	0.0	0.0	0.0	0.0

Accounts Receivable Net Current

us-gaap:AccountsReceivableNetCurrent

Period End	2020-10-31	2020-08-01	2020-04-30	2020-01-25	2019-10-26	2019-07-27	2019-04-30	2019-01-26	2018-10-27	2018-07-28	2018-04-30	2018-01-27	2017-10-28	2017-07-29	2017-04-30	2017-01-28	2016-10-29	2016-07-30	2016-04-30	2016-01-30	2015-10-31	2015-08-01	2015-04-30	2015-01-31	2014-11-01	2014-08-02	2014-04-30	2014-01-25	2013-10-26	2013-07-27	2013-04-30	2013-01-26	2012-10-27	2012-07-28	2012-04-30	2012-01-28	2011-10-29	2011-07-30	2011-04-30
Value	30	43	73	27	40	42	31	34	34	13	56	25	35	30	74	23	26	32	56	38	42	28	33	37	31	23	31	42	36	19	19	31	48	49	56	24	25	22	44
Percentage of AccountsReceivableNetCurrent	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Assets	5.2	7.5	12.6	5.0	7.4	8.0	6.1	6.8	7.1	2.9	12.0	5.9	8.2	7.3	17.2	6.0	6.7	8.4	13.7	10.0	11.2	7.4	8.5	9.8	8.1	6.1	8.2	11.6	10.3	5.6	5.4	8.8	13.6	14.6	15.3	7.5	7.9	7.3	13.4

Inventory Net

us-gaap:InventoryNet

Period End	2020-10-31	2020-08-01	2020-04-30	2020-01-25	2019-10-26	2019-07-27	2019-04-30	2019-01-26	2018-10-27	2018-07-28	2018-04-30	2018-01-27	2017-10-28	2017-07-29	2017-04-30	2017-01-28	2016-10-29	2016-07-30	2016-04-30	2016-01-30	2015-10-31	2015-08-01	2015-04-30	2015-01-31	2014-11-01	2014-08-02	2014-04-30	2014-01-25	2013-10-26	2013-07-27	2013-04-30	2013-01-26	2012-10-27	2012-07-28	2012-04-30	2012-01-28	2011-10-29	2011-07-30	2011-04-30
Value	51	45	45	65	52	56	54	50	46	42	38	77	76	72	60	68	55	44	37	46	48	43	39	48	51	46	50	55	60	68	62	63	44	44	43	48	41	38	38
Percentage of InventoryNet	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Assets	8.8	7.9	7.8	11.7	9.7	10.5	10.6	10.1	9.5	8.8	8.2	17.9	17.7	17.1	13.9	17.8	14.1	11.3	9.1	11.9	12.7	11.5	9.9	12.6	13.4	12.3	13.2	15.1	17.3	19.5	17.2	17.7	12.6	13.1	11.8	14.9	12.8	12.7	11.5

Inventory Finished Goods

us-gaap:InventoryFinishedGoods

Period End	2020-10-31	2020-08-01	2020-04-30	2020-01-25	2019-10-26	2019-07-27	2019-04-30	2019-01-26	2018-10-27	2018-07-28	2018-04-30	2018-01-27	2017-10-28	2017-07-29	2017-04-30	2017-01-28	2016-10-29	2016-07-30	2016-04-30	2016-01-30	2015-10-31	2015-08-01	2015-04-30	2015-01-31	2014-11-01	2014-08-02	2014-04-30	2014-01-25	2013-10-26	2013-07-27	2013-04-30	2013-01-26	2012-10-27	2012-07-28	2012-04-30
Value	28	26	29	23	22	27	25	25	24	17	14	31	37	40	30	30	30	28	26	29	28	26	25	30	34	29	31	37	37	40	36	32	28	25	24
Percentage of InventoryFinishedGoods	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Assets	4.8	4.6	5.0	4.1	4.2	5.1	5.1	5.0	5.0	3.6	3.1	7.4	8.7	9.7	7.1	7.9	7.9	7.3	6.4	7.4	7.6	6.9	6.4	8.0	8.9	7.8	8.1	10.2	10.7	11.6	10.1	9.0	7.9	7.4	6.8

Prepaid Expense And Other Assets Current

us-gaap:PrepaidExpenseAndOtherAssetsCurrent

Period End	2020-10-31	2020-08-01	2020-04-30	2020-01-25	2019-10-26	2019-07-27	2019-04-30	2019-01-26	2018-10-27	2018-07-28	2018-04-30	2018-01-27	2017-10-28	2017-07-29	2017-04-30	2017-01-28	2016-10-29	2016-07-30	2016-04-30	2016-01-30	2015-10-31	2015-08-01	2015-04-30	2015-01-31	2014-11-01	2014-08-02	2014-04-30	2014-01-25	2013-10-26	2013-07-27	2013-04-30	2013-01-26	2012-10-27	2012-07-28	2012-04-30	2012-01-28	2011-10-29	2011-07-30	2011-04-30
Value	7310000.0	5941000.0	6246000.0	6833000.0	8045000.0	7606000.0	7418000.0	6616000.0	5732000.0	5196000.0	5103000.0	5138000.0	5175000.0	5266000.0	5653000.0	5341000.0	4706000.0	4167000.0	4150000.0	4219000.0	4555000.0	3958000.0	4599000.0	4203000.0	4233000.0	3320000.0	4260000.0	3755000.0	4317000.0	3765000.0	4303000.0	4283000.0	4837000.0	3568000.0	4030000.0	2793000.0	2974000.0	2176000.0	2372000.0
Percentage of PrepaidExpenseAndOtherAssetsCurrent	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Assets	1.2	1.0	1.1	1.2	1.5	1.4	1.5	1.3	1.2	1.1	1.1	1.2	1.2	1.3	1.3	1.4	1.2	1.1	1.0	1.1	1.2	1.0	1.2	1.1	1.1	0.9	1.1	1.0	1.2	1.1	1.2	1.2	1.4	1.0	1.1	0.9	0.9	0.7	0.7

Property Plant And Equipment Gross

us-gaap:PropertyPlantAndEquipmentGross

Period End	2020-04-30	2019-04-30	2018-04-30	2017-04-30	2016-04-30	2015-04-30	2014-04-30	2013-04-30	2012-04-30
Value	101	92	88	101	92	84	83	78	67
Percentage of PropertyPlantAndEquipmentGross	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Assets	17.4	18.2	18.7	23.6	22.6	21.2	21.6	21.7	18.4

us-gaap:PropertyPlantAndEquipmentGross us-gaap:PropertyPlantAndEquipmentByType

avav:ComputerEquipmentAndSoftware

Period End	2020-04-30	2019-04-30	2018-04-30	2017-04-30	2016-04-30	2015-04-30	2014-04-30	2013-04-30	2012-04-30
Value	33	35	31	32	30	26	24	23	14
Percentage of PropertyPlantAndEquipmentGross	32.7	38.0	36.1	31.9	32.5	31.1	29.3	29.7	22.0
Percentage of Assets	5.7	6.9	6.7	7.5	7.4	6.6	6.3	6.4	4.0
Percentage of Assets avav:ComputerEquipmentAndSoftware	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0

us-gaap:ConstructionInProgress

Period End	2020-04-30	2019-04-30	2018-04-30	2017-04-30	2016-04-30	2015-04-30	2014-04-30	2013-04-30	2012-04-30
Value	2.508	2.411	3.359	4.608	3.885	1.634	6.344	7.142	9.103
Percentage of PropertyPlantAndEquipmentGross	2.5	2.6	3.8	4.5	4.2	1.9	7.6	9.1	13.4
Percentage of Assets	0.4	0.5	0.7	1.1	0.9	0.4	1.6	2.0	2.5
Percentage of Assets us-gaap:ConstructionInProgress	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0

us-gaap:FurnitureAndFixtures

Period End	2020-04-30	2019-04-30	2018-04-30	2017-04-30	2016-04-30	2015-04-30	2014-04-30	2013-04-30	2012-04-30
Value	3.031	2.145	2.094	1.962	1.73	1.877	1.84	1.866	2.415
Percentage of PropertyPlantAndEquipmentGross	3.0	2.3	2.4	1.9	1.9	2.2	2.2	2.4	3.6
Percentage of Assets	0.5	0.4	0.4	0.5	0.4	0.5	0.5	0.5	0.7
Percentage of Assets us-gaap:FurnitureAndFixtures	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0

us-gaap:LeaseholdImprovements

Period End	2020-04-30	2019-04-30	2018-04-30	2017-04-30	2016-04-30	2015-04-30	2014-04-30	2013-04-30	2012-04-30
Value	16	12	10	9.809	8.939	9.117	8.611	8.498	8.471
Percentage of PropertyPlantAndEquipmentGross	16.1	13.3	11.9	9.6	9.6	10.8	10.4	10.8	12.5
Percentage of Assets	2.8	2.4	2.2	2.3	2.2	2.3	2.2	2.3	2.3
Percentage of Assets us-gaap:LeaseholdImprovements	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0

us-gaap:MachineryAndEquipment

Period End	2020-04-30	2019-04-30	2018-04-30	2017-04-30	2016-04-30	2015-04-30	2014-04-30	2013-04-30	2012-04-30
Value	46	40	40	53	48	45	42	37	32
Percentage of PropertyPlantAndEquipmentGross	45.7	43.8	45.7	52.1	51.8	54.0	50.5	48.1	48.5
Percentage of Assets	8.0	7.9	8.5	12.3	11.7	11.5	10.9	10.4	8.9
Percentage of Assets us-gaap:MachineryAndEquipment	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0

Accumulated Depreciation Depletion And Amortization Property Plant And Equipment

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment

Period End	2020-04-30	2019-04-30	2018-04-30	2017-04-30	2016-04-30	2015-04-30	2014-04-30	2013-04-30	2012-04-30
Value	79	75	69	82	75	70	63	54	44
Percentage of AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Assets	13.7	14.8	14.6	19.1	18.5	17.8	16.4	15.0	12.0

Amortization Of Intangible Assets

us-gaap:AmortizationOfIntangibleAssets

Period End	2020-10-31	2020-08-01	2020-04-30	2020-01-25	2019-10-26	2019-07-27	2019-04-30	2019-01-26	2018-10-27	2018-07-28
Value	715000.0	709000.0	720000.0	775000.0	775000.0	552000.0	104000.0	104000.0	80000.0	69000.0
Percentage of AmortizationOfIntangibleAssets	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Assets	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0

us-gaap:AmortizationOfIntangibleAssets us-gaap:BusinessAcquisition

avav:PulseAerospaceLlc

Period End	2020-04-30	2020-01-25
Value	4251000.0	-671000.0
Percentage of AmortizationOfIntangibleAssets	590.4	-86.6
Percentage of Assets	0.0	0.0
Percentage of Assets avav:PulseAerospaceLlc	0.0	0.0

Property Plant And Equipment Net

us-gaap:PropertyPlantAndEquipmentNet

Period End	2020-10-31	2020-08-01	2020-04-30	2020-01-25	2019-10-26	2019-07-27	2019-04-30	2019-01-26	2018-10-27	2018-07-28	2018-04-30	2018-01-27	2017-10-28	2017-07-29	2017-04-30	2017-01-28	2016-10-29	2016-07-30	2016-04-30	2016-01-30	2015-10-31	2015-08-01	2015-04-30	2015-01-31	2014-11-01	2014-08-02	2014-04-30	2014-01-25	2013-10-26	2013-07-27	2013-04-30	2013-01-26	2012-10-27	2012-07-28	2012-04-30	2012-01-28	2011-10-29	2011-07-30	2011-04-30
Value	22	22	21	19	20	17	16	20	20	19	19	21	21	20	19	18	17	16	16	14	13	13	13	16	16	17	19	24	26	26	24	21	22	23	23	20	18	18	17
Percentage of PropertyPlantAndEquipmentNet	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Assets	3.9	4.0	3.7	3.6	3.8	3.3	3.3	4.1	4.2	4.0	4.1	5.0	5.0	4.8	4.4	4.8	4.5	4.3	4.1	3.7	3.6	3.4	3.4	4.2	4.4	4.7	5.2	6.7	7.4	7.6	6.7	6.1	6.2	6.8	6.4	6.5	5.8	6.0	5.3

Long Term Investments

us-gaap:LongTermInvestments

Period End	2020-10-31	2020-08-01	2020-04-30	2020-01-25	2019-10-26	2019-07-27	2019-04-30	2019-01-26	2018-10-27	2018-07-28	2018-04-30	2018-01-27	2017-10-28	2017-07-29	2017-04-30	2017-01-28	2016-10-29	2016-07-30	2016-04-30	2016-01-30	2015-10-31	2015-08-01	2015-04-30	2015-01-31	2014-11-01	2014-08-02	2014-04-30	2014-01-25	2013-10-26	2013-07-27	2013-04-30	2013-01-26	2012-10-27	2012-07-28	2012-04-30	2012-01-28	2011-10-29	2011-07-30	2011-04-30
Value	20	20	15	26	13	4.887	9.386	27	30	36	40	38	33	35	42	43	42	33	33	38	37	44	46	54	49	39	50	45	51	67	68	60	64	56	58	36	22	6.154	6.275
Percentage of LongTermInvestments	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Assets	3.6	3.5	2.6	4.7	2.5	0.9	1.8	5.6	6.3	7.6	8.6	9.0	7.7	8.5	9.7	11.3	10.9	8.5	8.3	9.8	9.9	11.7	11.8	14.1	12.9	10.4	13.1	12.5	14.7	19.2	19.0	17.0	18.2	16.7	15.8	11.2	7.0	2.0	1.9

us-gaap:LongTermInvestments us-gaap:FinancialInstrument, us-gaap:InvestmentType

us-gaap:MunicipalBonds, us-gaap:AvailableforsaleSecurities

Period End	2020-10-31	2020-04-30
Value	5.64	1.592
Percentage of LongTermInvestments	26.9	10.6
Percentage of Assets	1.0	0.3
Percentage of Assets us-gaap:MunicipalBonds us-gaap:AvailableforsaleSecurities	0.0	0.0

us-gaap:USGovernmentDebtSecurities, us-gaap:AvailableforsaleSecurities

Period End	2020-10-31	2020-08-01	2020-04-30
Value	10	15	8.996
Percentage of LongTermInvestments	47.7	73.8	59.9
Percentage of Assets	1.7	2.6	1.5
Percentage of Assets us-gaap:USGovernmentDebtSecurities us-gaap:AvailableforsaleSecurities	0.0	0.0	0.0

us-gaap:LongTermInvestments us-gaap:InvestmentType

us-gaap:AvailableforsaleSecurities

Period End	2020-10-31	2020-08-01	2020-04-30	2020-01-25	2019-10-26	2019-07-27	2018-04-30	2018-01-27	2017-10-28	2017-07-29	2017-04-30	2017-01-28	2016-10-29	2016-07-30	2016-04-30	2016-01-30	2015-10-31	2015-08-01	2015-04-30	2015-01-31	2014-11-01	2014-08-02	2014-04-30	2014-01-25	2013-04-30
Value	15	15	10	4.947	4.947	2.693	2.142	2.118	2.096	2.053	2.497	2.418	2.452	2.41	2.78	2.778	2.765	2.744	2.841	2.861	2.761	8.942	16	13	14
Percentage of LongTermInvestments	74.6	73.8	70.4	18.7	36.7	55.1	5.3	5.5	6.3	5.7	5.9	5.5	5.8	7.3	8.2	7.3	7.3	6.1	6.1	5.2	5.6	22.7	33.4	29.8	21.4
Percentage of Assets	2.7	2.6	1.8	0.9	0.9	0.5	0.5	0.5	0.5	0.5	0.6	0.6	0.6	0.6	0.7	0.7	0.7	0.7	0.7	0.7	0.7	2.4	4.4	3.7	4.1
Percentage of Assets us-gaap:AvailableforsaleSecurities	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0

Goodwill

us-gaap:Goodwill

Period End	2020-10-31	2020-08-01	2020-04-30	2020-01-25	2019-10-26	2019-07-27	2017-07-29	2017-04-30	2016-07-30
Value	6340000.0	6340000.0	6340000.0	6340000.0	8080000.0	8080000.0	122000.0	122000.0	122000.0
Percentage of Goodwill	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Assets	1.1	1.1	1.1	1.1	1.5	1.5	0.0	0.0	0.0

us-gaap:Goodwill us-gaap:BusinessAcquisition

avav:PulseAerospaceLlc

Period End	2020-10-31	2020-08-01	2020-04-30	2019-06-10
Value	6340000.0	6340000.0	6340000.0	8080000.0
Percentage of Goodwill	100.0	100.0	100.0	0.0
Percentage of Assets	1.1	1.1	1.1	0.0
Percentage of Assets avav:PulseAerospaceLlc	0.0	0.0	0.0	0.0

Intangible Assets Net Excluding Goodwill

us-gaap:IntangibleAssetsNetExcludingGoodwill

Period End	2020-10-31	2020-08-01	2020-04-30	2020-01-25	2019-10-26	2019-07-27	2019-04-30
Value	12	12	13	14	15	16	0.459
Percentage of IntangibleAssetsNetExcludingGoodwill	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Assets	2.1	2.2	2.3	2.6	2.9	3.1	0.1

us-gaap:IntangibleAssetsNetExcludingGoodwill us-gaap:IncomeStatementLocation

us-gaap:OtherNoncurrentAssets

Period End	2020-04-30	2019-04-30
Value	13	0.459
Percentage of IntangibleAssetsNetExcludingGoodwill	100.0	100.0
Percentage of Assets	2.3	0.1
Percentage of Assets us-gaap:OtherNoncurrentAssets	0.0	0.0

Finite Lived Intangible Assets Net

us-gaap:FiniteLivedIntangibleAssetsNet

Period End	2020-04-30	2019-04-30	2019-01-26	2018-10-27	2018-07-28	2018-04-30	2018-01-27	2017-10-28	2017-07-29	2017-04-30
Value	12	0.459	0.562	0.666	0.559	0.628	0.729	0.766	1.744	1.407
Percentage of FiniteLivedIntangibleAssetsNet	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Assets	2.2	0.1	0.1	0.1	0.1	0.1	0.2	0.2	0.4	0.3

Deferred Tax Assets Liabilities Net

us-gaap:DeferredTaxAssetsLiabilitiesNet

Period End	2020-04-30	2019-04-30	2018-04-30	2017-04-30	2016-04-30	2015-04-30	2014-04-30	2013-04-30	2012-04-30
Value	4.928	6.656	11	14	14	12	11	10	14
Percentage of DeferredTaxAssetsLiabilitiesNet	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Assets	0.8	1.3	2.3	3.5	3.6	3.2	3.1	3.0	4.0

Operating Lease Right Of Use Asset

us-gaap:OperatingLeaseRightOfUseAsset

Period End	2020-10-31	2020-08-01	2020-04-30
Value	12	13	8.793
Percentage of OperatingLeaseRightOfUseAsset	100.0	100.0	100.0
Percentage of Assets	2.1	2.4	1.5

Other Assets Noncurrent

us-gaap:OtherAssetsNoncurrent

Period End	2020-10-31	2020-08-01	2020-04-30	2020-01-25	2019-10-26	2019-07-27	2019-04-30	2019-01-26	2018-10-27	2018-07-28	2018-04-30	2018-01-27	2017-10-28	2017-07-29	2017-04-30	2017-01-28	2016-10-29	2016-07-30	2016-04-30	2016-01-30	2015-10-31	2015-08-01	2015-04-30	2015-01-31	2014-11-01	2014-08-02	2014-04-30	2014-01-25	2013-10-26	2013-07-27	2013-04-30	2013-01-26	2012-10-27	2012-07-28	2012-04-30	2012-01-28	2011-10-29	2011-07-30	2011-04-30
Value	0.102	9.64	10	16	13	14	6.28	0.884	1.628	2.299	2.721	2.305	0.838	1.938	2.01	0.57	0.598	0.658	0.75	0.653	0.69	0.672	0.741	1.219	0.837	0.971	0.874	1.585	1.72	1.036	1.06	4.159	0.23	0.23	0.201	0.201	0.186	0.181	0.181
Percentage of OtherAssetsNoncurrent	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Assets	0.0	1.7	1.8	3.0	2.4	2.7	1.2	0.2	0.3	0.5	0.6	0.5	0.2	0.5	0.5	0.1	0.2	0.2	0.2	0.2	0.2	0.2	0.2	0.3	0.2	0.3	0.2	0.4	0.5	0.3	0.3	1.2	0.1	0.1	0.1	0.1	0.1	0.1	0.1

Liabilities Current

us-gaap:LiabilitiesCurrent

Period End	2020-10-31	2020-08-01	2020-04-30	2020-01-25	2019-10-26	2019-07-27	2019-04-30	2019-01-26	2018-10-27	2018-07-28	2018-04-30	2018-01-27	2017-10-28	2017-07-29	2017-04-30	2017-01-28	2016-10-29	2016-07-30	2016-04-30	2016-01-30	2015-10-31	2015-08-01	2015-04-30	2015-01-31	2014-11-01	2014-08-02	2014-04-30	2014-01-25	2013-10-26	2013-07-27	2013-04-30	2013-01-26	2012-10-27	2012-07-28	2012-04-30	2012-01-28	2011-10-29	2011-07-30	2011-04-30
Value	53	46	66	60	44	43	44	41	39	40	60	40	37	37	48	37	39	35	46	32	31	36	46	43	43	33	37	35	33	36	42	38	41	36	63	38	43	29	62
Percentage of LiabilitiesCurrent	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Assets	9.1	8.0	11.4	10.8	8.2	8.1	8.8	8.4	8.1	8.5	12.8	9.4	8.8	9.0	11.1	9.8	10.1	9.1	11.3	8.4	8.3	9.5	11.8	11.3	11.2	8.7	9.8	9.8	9.5	10.5	11.6	10.8	11.5	10.7	17.3	12.0	13.6	9.9	18.7

Accounts Payable Current

us-gaap:AccountsPayableCurrent

Period End	2020-10-31	2020-08-01	2020-04-30	2020-01-25	2019-10-26	2019-07-27	2019-04-30	2019-01-26	2018-10-27	2018-07-28	2018-04-30	2018-01-27	2017-10-28	2017-07-29	2017-04-30	2017-01-28	2016-10-29	2016-07-30	2016-04-30	2016-01-30	2015-10-31	2015-08-01	2015-04-30	2015-01-31	2014-11-01	2014-08-02	2014-04-30	2014-01-25	2013-10-26	2013-07-27	2013-04-30	2013-01-26	2012-10-27	2012-07-28	2012-04-30	2012-01-28	2011-10-29	2011-07-30	2011-04-30
Value	14	11	19	14	11	11	15	11	14	12	21	13	15	13	20	13	18	10	17	9.786	11	12	19	16	18	13	13	15	11	13	16	15	15	13	20	13	19	12	31
Percentage of AccountsPayableCurrent	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Assets	2.4	2.0	3.4	2.6	2.0	2.1	3.1	2.3	2.9	2.7	4.5	3.1	3.7	3.3	4.7	3.6	4.8	2.7	4.3	2.5	3.0	3.4	4.8	4.2	4.9	3.5	3.6	4.1	3.4	3.9	4.4	4.4	4.3	3.8	5.5	4.1	6.1	4.2	9.4

Accrued Income Taxes Current

us-gaap:AccruedIncomeTaxesCurrent

Period End	2020-10-31	2020-08-01	2020-04-30	2019-01-26	2018-10-27	2018-07-28	2018-04-30	2017-10-28	2017-04-30	2016-04-30	2015-04-30
Value	3018000.0	2620000.0	1065000.0	4857000.0	4851000.0	8898000.0	4085000.0	350000.0	1418000.0	943000.0	692000.0
Percentage of AccruedIncomeTaxesCurrent	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Assets	0.5	0.5	0.2	1.0	1.0	1.9	0.9	0.1	0.3	0.2	0.2

Operating Lease Liability Current

us-gaap:OperatingLeaseLiabilityCurrent

Period End	2020-10-31	2020-08-01	2020-04-30
Value	4030000.0	4478000.0	3380000.0
Percentage of OperatingLeaseLiabilityCurrent	100.0	100.0	100.0
Percentage of Assets	0.7	0.8	0.6

Other Liabilities Current

us-gaap:OtherLiabilitiesCurrent

Period End	2020-10-31	2020-08-01	2020-04-30	2020-01-25	2019-10-26	2019-07-27	2019-04-30	2019-01-26	2018-10-27	2018-07-28	2018-04-30	2018-01-27	2017-10-28	2017-07-29	2017-04-30	2017-01-28	2016-10-29	2016-07-30	2016-04-30	2016-01-30	2015-10-31	2015-08-01	2015-04-30	2015-01-31	2014-11-01	2014-08-02	2014-04-30	2014-01-25	2013-10-26	2013-07-27	2013-04-30	2013-01-26	2012-10-27	2012-07-28	2012-04-30	2012-01-28	2011-10-29	2011-07-30	2011-04-30
Value	10	8.735	10	13	13	12	7.425	8.062	6.971	6.664	6.892	8.651	7.441	8.53	10	7.753	6.997	12	11	6.408	5.669	8.757	9.17	10	9.709	5.861	6.762	6.486	6.261	7.194	6.408	6.877	6.129	7.391	9.898	9.114	8.343	7.535	7.384
Percentage of OtherLiabilitiesCurrent	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Assets	1.8	1.5	1.8	2.3	2.4	2.3	1.5	1.6	1.4	1.4	1.5	2.0	1.7	2.0	2.3	2.0	1.8	3.3	2.7	1.6	1.5	2.3	2.3	2.7	2.5	1.5	1.8	1.8	1.8	2.0	1.8	1.9	1.7	2.2	2.7	2.8	2.6	2.5	2.2

Contract With Customer Liability Current

us-gaap:ContractWithCustomerLiabilityCurrent

Period End	2020-04-30	2019-07-27	2019-04-30	2019-01-26	2018-10-27	2018-04-30
Value	7899000.0	3268000.0	2962000.0	2875000.0	2449000.0	3564000.0
Percentage of ContractWithCustomerLiabilityCurrent	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Assets	1.4	0.6	0.6	0.6	0.5	0.8

Minority Interest

us-gaap:MinorityInterest

Period End	2020-10-31	2020-08-01	2020-01-25	2019-10-26	2019-07-27	2019-04-30	2019-01-26	2018-10-27	2018-07-28	2018-04-30	2018-01-27	2017-10-28	2017-07-29	2017-04-30
Value	-59000.0	-37000.0	-23000.0	-3000.0	-7000.0	4000.0	-17000.0	2000.0	9000.0	23000.0	1000.0	9000.0	216000.0	239000.0
Percentage of MinorityInterest	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Assets	-0.0	-0.0	-0.0	-0.0	-0.0	0.0	-0.0	0.0	0.0	0.0	0.0	0.0	0.1	0.1

Other Liabilities Noncurrent

us-gaap:OtherLiabilitiesNoncurrent

Period End	2020-10-31	2020-08-01	2020-04-30	2020-01-25	2019-10-26	2019-07-27	2019-04-30	2019-01-26	2018-10-27	2018-07-28	2018-04-30	2018-01-27	2017-10-28	2017-07-29	2017-04-30	2017-01-28	2016-10-29	2016-07-30	2016-04-30
Value	243000.0	243000.0	250000.0	250000.0	2422000.0	2298000.0	150000.0	160000.0	1306000.0	958000.0	622000.0	184000.0	184000.0	184000.0	184000.0	193000.0	193000.0	184000.0	184000.0
Percentage of OtherLiabilitiesNoncurrent	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Assets	0.0	0.0	0.0	0.0	0.4	0.4	0.0	0.0	0.3	0.2	0.1	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0

Operating Lease Liability Noncurrent

us-gaap:OperatingLeaseLiabilityNoncurrent

Period End	2020-10-31	2020-08-01	2020-04-30
Value	9.422	10	6.833
Percentage of OperatingLeaseLiabilityNoncurrent	100.0	100.0	100.0
Percentage of Assets	1.6	1.8	1.2

Lessee Operating Lease Liability Payments Due Year Two

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearTwo

Period End	2020-10-31	2020-08-01
Value	4581000.0	4653000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	100.0	100.0
Percentage of Assets	0.8	0.8

Lessee Operating Lease Liability Payments Due Year Three

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearThree

Period End	2020-10-31	2020-08-01
Value	3173000.0	3247000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearThree	100.0	100.0
Percentage of Assets	0.5	0.6

Lessee Operating Lease Liability Payments Due Year Four

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFour

Period End	2020-10-31	2020-08-01
Value	2608000.0	2615000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearFour	100.0	100.0
Percentage of Assets	0.4	0.5

Lessee Operating Lease Liability Payments Due Year Five

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueYearFive

Period End	2020-10-31	2020-08-01
Value	1661000.0	1668000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueYearFive	100.0	100.0
Percentage of Assets	0.3	0.3

Lessee Operating Lease Liability Payments Due After Year Five

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive

Period End	2020-10-31	2020-08-01
Value	763000.0	773000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive	100.0	100.0
Percentage of Assets	0.1	0.1

Operating Lease Liability

us-gaap:OperatingLeaseLiability

Period End	2020-10-31	2020-08-01
Value	13	14
Percentage of OperatingLeaseLiability	100.0	100.0
Percentage of Assets	2.3	2.6

Lessee Operating Lease Liability Payments Due

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDue

Period End	2020-10-31	2020-08-01
Value	15	16
Percentage of LesseeOperatingLeaseLiabilityPaymentsDue	100.0	100.0
Percentage of Assets	2.6	2.9

Lessee Operating Lease Liability Undiscounted Excess Amount

us-gaap:LesseeOperatingLeaseLiabilityUndiscountedExcessAmount

Period End	2020-10-31	2020-08-01
Value	1568000.0	1710000.0
Percentage of LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	100.0	100.0
Percentage of Assets	0.3	0.3

Stockholders Equity

us-gaap:StockholdersEquity

Period End	2020-10-31	2020-08-01	2020-04-30	2020-01-25	2019-10-26	2019-07-27	2019-04-30	2019-01-26	2018-10-27	2018-07-28	2018-04-30	2018-01-27	2017-10-28	2017-07-29	2017-04-30	2017-01-28	2016-10-29	2016-07-30	2016-04-30	2016-01-30	2015-10-31	2015-08-01	2015-04-30	2015-01-31	2014-11-01	2014-08-02	2014-04-30	2014-01-25	2013-10-26	2013-07-27	2013-04-30	2013-01-26	2012-10-27	2012-07-28	2012-04-30	2012-01-28	2011-10-29	2011-04-30	2010-04-30	2009-04-30
Value	523	519	509	490	490	481	462	455	444	437	410	390	389	380	381	347	348	351	361	354	346	345	348	340	338	340	342	324	311	308	315	315	310	299	299	279	272	263	233	207
Percentage of StockholdersEquity	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Assets	89.1	90.0	87.2	87.8	90.1	90.1	90.9	91.3	91.3	91.0	86.7	90.2	90.7	90.5	88.3	89.6	89.3	90.2	88.0	91.0	91.2	90.0	87.8	88.2	87.6	90.0	89.0	88.5	88.8	87.8	86.7	87.8	87.1	87.9	81.1	86.2	84.5	79.4	0.0	0.0

us-gaap:StockholdersEquity us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome

Period End	2020-10-31	2020-08-01	2020-04-30	2020-01-25	2019-10-26	2019-07-27	2019-04-30	2019-01-26	2018-10-27	2018-07-28	2018-04-30	2017-04-30	2016-04-30	2015-04-30	2014-04-30	2013-04-30	2012-04-30	2011-04-30	2010-04-30	2009-04-30
Value	0.342	0.351	0.328	0.069	0.181	0.171	0.002	0.004	0.005	0.016	-0.021	-0.127	-0.201	-1.358	-0.263	-0.705	-0.694	-0.784	-0.76	-0.537
Percentage of StockholdersEquity	0.1	0.1	0.1	0.0	0.0	0.0	0.0	0.0	0.0	0.0	-0.0	-0.0	-0.1	-0.4	-0.1	-0.2	-0.2	-0.3	-0.3	-0.3
Percentage of Assets	0.1	0.1	0.1	0.0	0.0	0.0	0.0	0.0	0.0	0.0	-0.0	-0.0	-0.0	-0.3	-0.1	-0.2	-0.2	-0.2	0.0	0.0
Percentage of Assets us-gaap:AccumulatedOtherComprehensiveIncome	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0

us-gaap:AdditionalPaidInCapital

Period End	2020-10-31	2020-08-01	2020-04-30	2020-01-25	2019-10-26	2019-07-27	2019-04-30	2019-01-26	2018-10-27	2018-07-28	2018-04-30	2017-04-30	2016-04-30	2015-04-30	2014-04-30	2013-04-30	2012-04-30	2011-04-30	2010-04-30	2009-04-30
Value	183	181	181	180	178	177	176	174	171	170	170	162	154	148	143	130	124	119	115	110
Percentage of StockholdersEquity	35.0	34.9	35.6	36.7	36.4	36.8	38.1	38.4	38.7	39.1	41.5	42.5	42.7	42.5	41.9	41.4	41.8	45.5	49.5	53.1
Percentage of Assets	31.2	31.4	31.0	32.2	32.8	33.1	34.6	35.1	35.3	35.6	36.0	37.5	37.6	37.3	37.3	35.9	33.8	36.1	0.0	0.0
Percentage of Assets us-gaap:AdditionalPaidInCapital	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0

us-gaap:NoncontrollingInterest

Period End	2020-10-31	2020-08-01	2020-01-25	2019-10-26	2019-07-27	2019-04-30	2019-01-26	2018-10-27	2018-07-28	2018-04-30	2017-04-30
Value	-0.059	-0.037	-0.023	-0.003	-0.007	0.004	-0.017	0.002	0.009	0.023	0.239
Percentage of StockholdersEquity	-0.0	-0.0	-0.0	-0.0	-0.0	0.0	-0.0	0.0	0.0	0.0	0.1
Percentage of Assets	-0.0	-0.0	-0.0	-0.0	-0.0	0.0	-0.0	0.0	0.0	0.0	0.1
Percentage of Assets us-gaap:NoncontrollingInterest	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0

us-gaap:Parent

Period End	2020-10-31	2020-08-01	2020-04-30	2020-01-25	2019-10-26	2019-07-27	2019-04-30	2019-01-26	2018-10-27	2018-07-28	2018-04-30	2017-04-30	2016-04-30	2015-04-30
Value	523	519	509	490	490	481	462	455	444	437	410	381	361	348
Percentage of StockholdersEquity	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Assets	89.1	90.0	87.2	87.8	90.1	90.1	90.9	91.3	91.3	91.0	86.7	88.3	88.0	87.8
Percentage of Assets us-gaap:Parent	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0

us-gaap:RetainedEarnings

Period End	2020-10-31	2020-08-01	2020-04-30	2020-01-25	2019-10-26	2019-07-27	2019-04-30	2019-01-26	2018-10-27	2018-07-28	2018-04-30	2017-04-30	2016-04-30	2015-04-30	2014-04-30	2013-04-30	2012-04-30	2011-04-30	2010-04-30	2009-04-30
Value	340	338	328	310	311	304	286	280	272	266	239	219	207	201	199	185	174	144	118	97
Percentage of StockholdersEquity	64.9	65.0	64.3	63.3	63.6	63.2	61.9	61.6	61.3	60.9	58.5	57.6	57.4	57.9	58.1	58.8	58.5	54.8	50.8	47.2
Percentage of Assets	57.9	58.5	56.1	55.6	57.2	56.9	56.3	56.3	56.0	55.4	50.7	50.9	50.5	50.8	51.7	51.0	47.4	43.6	0.0	0.0
Percentage of Assets us-gaap:RetainedEarnings	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0

Stockholders Equity Including Portion Attributable To Noncontrolling Interest

us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest

Period End	2020-10-31	2020-08-01	2020-04-30	2020-01-25	2019-10-26	2019-07-27	2019-04-30	2019-01-26	2018-10-27	2018-07-28	2018-04-30	2018-01-27	2017-10-28	2017-07-29	2017-04-30	2016-04-30	2015-04-30	2014-04-30	2011-07-30	2011-04-30
Value	523	519	509	490	490	481	462	455	444	437	410	390	389	380	382	361	348	342	265	263
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Assets	89.1	90.0	87.2	87.8	90.1	90.1	90.9	91.3	91.3	91.0	86.7	90.2	90.7	90.5	88.4	88.1	87.8	89.0	88.0	79.4

Additional Paid In Capital Common Stock

us-gaap:AdditionalPaidInCapitalCommonStock

Period End	2020-10-31	2020-08-01	2020-04-30	2020-01-25	2019-10-26	2019-07-27	2019-04-30	2019-01-26	2018-10-27	2018-07-28	2018-04-30	2018-01-27	2017-10-28	2017-07-29	2017-04-30	2017-01-28	2016-10-29	2016-07-30	2016-04-30	2016-01-30	2015-10-31	2015-08-01	2015-04-30	2015-01-31	2014-11-01	2014-08-02	2014-04-30	2014-01-25	2013-10-26	2013-07-27	2013-04-30	2013-01-26	2012-10-27	2012-07-28	2012-04-30	2012-01-28	2011-10-29	2011-07-30	2011-04-30
Value	183	181	181	180	178	177	176	174	171	170	170	168	166	165	162	157	156	155	154	152	151	150	148	147	146	145	143	134	132	131	130	129	128	126	124	123	122	121	119
Percentage of AdditionalPaidInCapitalCommonStock	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Assets	31.2	31.4	31.0	32.2	32.8	33.1	34.6	35.1	35.3	35.6	36.0	39.0	38.9	39.3	37.5	40.8	40.2	40.0	37.6	39.3	39.8	39.2	37.3	38.1	37.9	38.4	37.3	36.6	37.8	37.4	35.9	36.1	36.1	37.1	33.8	38.0	37.8	40.2	36.1

Retained Earnings Accumulated Deficit

us-gaap:RetainedEarningsAccumulatedDeficit

Period End	2020-10-31	2020-08-01	2020-04-30	2020-01-25	2019-10-26	2019-07-27	2019-04-30	2019-01-26	2018-10-27	2018-07-28	2018-04-30	2018-01-27	2017-10-28	2017-07-29	2017-04-30	2017-01-28	2016-10-29	2016-07-30	2016-04-30	2016-01-30	2015-10-31	2015-08-01	2015-04-30	2015-01-31	2014-11-01	2014-08-02	2014-04-30	2014-01-25	2013-10-26	2013-07-27	2013-04-30	2013-01-26	2012-10-27	2012-07-28	2012-04-30	2012-01-28	2011-10-29	2011-07-30	2011-04-30
Value	340	338	328	310	311	304	286	280	272	266	239	221	222	215	219	189	191	195	207	201	195	194	201	194	192	195	199	191	179	178	185	186	182	173	174	157	151	144	144
Percentage of RetainedEarningsAccumulatedDeficit	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Assets	57.9	58.5	56.1	55.6	57.2	56.9	56.3	56.3	56.0	55.4	50.7	51.2	51.8	51.2	50.9	48.9	49.2	50.3	50.5	51.8	51.5	50.9	50.8	50.4	49.9	51.6	51.7	52.1	51.3	50.7	51.0	51.9	51.2	51.0	47.4	48.4	46.9	48.0	43.6

Accumulated Other Comprehensive Income Loss Net Of Tax

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax

Period End	2020-10-31	2020-08-01	2020-04-30	2020-01-25	2019-10-26	2019-07-27	2019-04-30	2019-01-26	2018-10-27	2018-07-28	2018-04-30	2018-01-27	2017-10-28	2017-07-29	2017-04-30	2017-01-28	2016-10-29	2016-07-30	2016-04-30	2016-01-30	2015-10-31	2015-08-01	2015-04-30	2015-01-31	2014-11-01	2014-08-02	2014-04-30	2014-01-25	2013-10-26	2013-07-27	2013-04-30	2013-01-26	2012-10-27	2012-07-28	2012-04-30	2012-01-28	2011-10-29	2011-07-30	2011-04-30
Value	342000.0	351000.0	328000.0	69000.0	181000.0	171000.0	2000.0	4000.0	5000.0	16000.0	-21000.0	-25000.0	-98000.0	-125000.0	-127000.0	-169000.0	-158000.0	-183000.0	-201000.0	-194000.0	-201000.0	-226000.0	-1358000.0	-1441000.0	-859000.0	-215000.0	-263000.0	-618000.0	-676000.0	-753000.0	-705000.0	-652000.0	-667000.0	-657000.0	-694000.0	-697000.0	-741000.0	-782000.0	-784000.0
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Assets	0.1	0.1	0.1	0.0	0.0	0.0	0.0	0.0	0.0	0.0	-0.0	-0.0	-0.0	-0.0	-0.0	-0.0	-0.0	-0.0	-0.0	-0.0	-0.1	-0.1	-0.3	-0.4	-0.2	-0.1	-0.1	-0.2	-0.2	-0.2	-0.2	-0.2	-0.2	-0.2	-0.2	-0.2	-0.2	-0.3	-0.2

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax us-gaap:StatementEquityComponents

us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss

Period End	2020-04-30	2018-04-30	2018-01-27	2017-10-28	2017-07-29	2017-04-30	2017-01-28	2016-10-29	2016-07-30	2016-04-30	2016-01-30	2015-10-31	2015-08-01	2015-04-30	2015-01-31	2014-11-01	2014-08-02	2014-04-30	2014-01-25	2013-10-26	2013-07-27	2013-04-30
Value	50000.0	-57000.0	-85000.0	-98000.0	-125000.0	-127000.0	-169000.0	-158000.0	-183000.0	-201000.0	-194000.0	-201000.0	-226000.0	-1358000.0	-1441000.0	-859000.0	-215000.0	-263000.0	-618000.0	-676000.0	-753000.0	-705000.0
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax	15.2	271.4	340.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Assets	0.0	-0.0	-0.0	-0.0	-0.0	-0.0	-0.0	-0.0	-0.0	-0.0	-0.0	-0.1	-0.1	-0.3	-0.4	-0.2	-0.1	-0.1	-0.2	-0.2	-0.2	-0.2
Percentage of Assets us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0

us-gaap:AccumulatedOtherComprehensiveIncome

Period End	2020-10-31	2020-08-01	2020-04-30	2020-01-25	2019-10-26	2019-07-27	2019-04-30	2019-01-26	2018-10-27	2018-07-28	2018-04-30	2018-01-27	2017-10-28	2017-07-29	2017-04-30	2016-04-30
Value	342000.0	351000.0	328000.0	69000.0	181000.0	171000.0	2000.0	4000.0	5000.0	16000.0	-21000.0	-23000.0	-98000.0	-125000.0	-127000.0	-201000.0
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	92.0	100.0	100.0	100.0	100.0
Percentage of Assets	0.1	0.1	0.1	0.0	0.0	0.0	0.0	0.0	0.0	0.0	-0.0	-0.0	-0.0	-0.0	-0.0	-0.0
Percentage of Assets us-gaap:AccumulatedOtherComprehensiveIncome	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0

us-gaap:AccumulatedTranslationAdjustment

Period End	2020-04-30	2019-04-30	2019-01-26	2018-10-27	2018-07-28	2018-04-30	2018-01-27
Value	278000.0	2000.0	4000.0	5000.0	16000.0	36000.0	62000.0
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax	84.8	100.0	100.0	100.0	100.0	-171.4	-248.0
Percentage of Assets	0.0	0.0	0.0	0.0	0.0	0.0	0.0
Percentage of Assets us-gaap:AccumulatedTranslationAdjustment	0.0	0.0	0.0	0.0	0.0	0.0	0.0

Minority Interest

us-gaap:MinorityInterest

Period End	2020-10-31	2020-08-01	2020-01-25	2019-10-26	2019-07-27	2019-04-30	2019-01-26	2018-10-27	2018-07-28	2018-04-30	2018-01-27	2017-10-28	2017-07-29	2017-04-30
Value	-59000.0	-37000.0	-23000.0	-3000.0	-7000.0	4000.0	-17000.0	2000.0	9000.0	23000.0	1000.0	9000.0	216000.0	239000.0
Percentage of MinorityInterest	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Assets	-0.0	-0.0	-0.0	-0.0	-0.0	0.0	-0.0	0.0	0.0	0.0	0.0	0.0	0.1	0.1

Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue

Period End	2020-10-31	2020-08-01	2020-04-30	2020-01-25	2019-10-26	2019-07-27	2019-04-30	2019-01-26	2018-10-27	2018-07-28
Value	1914000.0	1595000.0	1476000.0	1767000.0	1418000.0	1566000.0	1386000.0	3082000.0	1230000.0	1402000.0
Percentage of AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Assets	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital

Period End	2020-10-31	2020-08-01	2020-04-30	2020-01-25	2019-10-26	2019-07-27	2019-04-30	2019-01-26	2018-10-27	2018-07-28
Value	1914000.0	1595000.0	1476000.0	1767000.0	1418000.0	1566000.0	1386000.0	3082000.0	1230000.0	1402000.0
Percentage of AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Assets	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0
Percentage of Assets us-gaap:AdditionalPaidInCapital	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0

us-gaap:Parent

Period End	2020-10-31	2020-08-01	2020-04-30	2020-01-25	2019-10-26	2019-07-27	2019-04-30	2019-01-26	2018-10-27	2018-07-28
Value	1914000.0	1595000.0	1476000.0	1767000.0	1418000.0	1566000.0	1386000.0	3082000.0	1230000.0	1402000.0
Percentage of AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Assets	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0
Percentage of Assets us-gaap:Parent	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities

Period End	2020-10-31	2020-08-01	2019-10-26	2019-07-27	2018-01-27	2017-10-28	2017-07-29	2017-01-28	2016-10-29	2016-07-30	2011-07-30	2010-07-31
Value	31	26	4.806	3.113	3.997	2.837	21	-8.145	-5.036	-1.243	1.456	-5.254
Percentage of NetCashProvidedByUsedInOperatingActivities	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Revenues	34.3	30.7	5.8	3.6	6.3	3.8	48.6	-15.3	-10.0	-3.4	2.3	-13.7

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities

Period End	2020-10-31	2020-08-01	2019-10-26	2019-07-27	2018-01-27	2017-10-28	2017-07-29	2017-01-28	2016-10-29	2016-07-30	2011-07-30	2010-07-31
Value	1.53	-33.474	-11.083	-33.152	-9.195	-3.543	14	-7.751	-28.304	-0.894	17	21
Percentage of NetCashProvidedByUsedInInvestingActivities	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Revenues	1.7	-38.3	-13.3	-38.1	-14.4	-4.8	34.2	-14.6	-56.5	-2.5	28.2	57.3

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities

Period End	2020-10-31	2020-08-01	2020-04-30	2020-01-25	2019-10-26	2019-07-27	2019-04-30	2019-01-26	2018-10-27	2018-07-28	2018-04-30	2018-01-27	2017-10-28	2017-07-29	2017-04-30	2017-01-28	2016-10-29	2016-07-30	2011-07-30	2010-07-31
Value	-22000.0	-1670000.0	-914000.0	-266000.0	-75000.0	-575000.0	-68000.0	-101000.0	-206000.0	-809000.0	-51000.0	393000.0	342000.0	1336000.0	3106000.0	298000.0	-97000.0	163000.0	275000.0	135000.0
Percentage of NetCashProvidedByUsedInFinancingActivities	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Revenues	-0.0	-1.9	0.0	-0.4	-0.1	-0.7	0.0	-0.1	-0.3	-1.0	-0.0	0.6	0.5	3.1	2.5	0.6	-0.2	0.5	0.4	0.4

Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect

Period End	2020-10-31	2020-08-01	2020-04-30	2020-01-25	2019-10-26	2019-07-27	2019-04-30	2019-01-26	2018-10-27	2018-07-28
Value	33	-8.303	118	0.754	-6.352	-30.614	23	-1.886	-19.533	27
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Revenues	35.9	-9.5	0.0	1.2	-7.6	-35.2	0.0	-2.5	-26.8	34.9

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities

Period End	2020-10-31	2020-08-01	2019-10-26	2019-07-27	2018-01-27	2017-10-28	2017-07-29	2017-01-28	2016-10-29	2016-07-30	2011-07-30	2010-07-31
Value	31	26	4.806	3.113	3.997	2.837	21	-8.145	-5.036	-1.243	1.456	-5.254
Percentage of NetCashProvidedByUsedInOperatingActivities	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Revenues	34.3	30.7	5.8	3.6	6.3	3.8	48.6	-15.3	-10.0	-3.4	2.3	-13.7

Profit Loss

us-gaap:ProfitLoss

Period End	2020-10-31	2020-08-01	2020-04-30	2020-01-25	2019-10-26	2019-07-27	2019-04-30	2019-01-26	2018-10-27	2018-07-28	2018-04-30	2018-01-27	2017-10-28	2017-07-29	2017-04-30	2017-01-28	2016-10-29	2016-07-30	2011-07-30	2010-07-31
Value	2.072	10	17	-1.028	7.505	17	5.703	8.35	6.05	27	18	-0.837	6.812	-4.466	30	-2.183	-4.172	-11.642	0.326	-3.443
Percentage of ProfitLoss	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Revenues	2.2	11.5	0.0	-1.7	9.0	19.7	0.0	11.1	8.3	35.0	15.6	-1.3	9.2	-10.2	24.3	-4.1	-8.3	-32.1	0.5	-9.0

us-gaap:ProfitLoss us-gaap:StatementEquityComponents

us-gaap:NoncontrollingInterest

Period End	2020-08-01	2020-01-25	2019-10-26	2019-07-27	2019-01-26	2018-10-27
Value	-0.037	-0.02	0.004	-0.011	-0.019	-0.007
Percentage of ProfitLoss	-0.4	1.9	0.1	-0.1	-0.2	-0.1
Percentage of Revenues	-0.0	-0.0	0.0	-0.0	-0.0	-0.0
Percentage of Revenues us-gaap:NoncontrollingInterest	0.0	0.0	0.0	0.0	0.0	0.0

us-gaap:Parent

Period End	2020-08-01	2020-01-25	2019-10-26	2019-07-27	2019-01-26	2018-10-27
Value	10	-1.008	7.501	17	8.369	6.057
Percentage of ProfitLoss	100.4	98.1	99.9	100.1	100.2	100.1
Percentage of Revenues	11.5	-1.6	9.0	19.7	11.1	8.3
Percentage of Revenues us-gaap:Parent	0.0	0.0	0.0	0.0	0.0	0.0

us-gaap:RetainedEarnings

Period End	2020-10-31	2020-08-01	2020-01-25	2019-10-26	2019-07-27	2019-01-26	2018-10-27	2018-07-28
Value	2.094	10	-1.008	7.501	17	8.369	6.057	27
Percentage of ProfitLoss	101.1	100.4	98.1	99.9	100.1	100.2	100.1	100.1
Percentage of Revenues	2.3	11.5	-1.6	9.0	19.7	11.1	8.3	35.0
Percentage of Revenues us-gaap:RetainedEarnings	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0

Depreciation Depletion And Amortization

us-gaap:DepreciationDepletionAndAmortization

Period End	2020-10-31	2020-08-01	2020-04-30	2020-01-25	2019-10-26	2019-07-27	2019-04-30	2019-01-26	2018-10-27	2018-07-28	2018-04-30	2018-01-27	2017-10-28	2017-07-29	2017-04-30	2017-01-28	2016-10-29	2016-07-30	2016-04-30	2016-01-30	2015-10-31	2015-08-01	2015-04-30	2015-01-31	2014-11-01	2014-08-02	2014-04-30	2014-01-25	2013-10-26	2013-07-27	2013-04-30	2013-01-26	2012-10-27	2012-07-28	2012-04-30	2012-01-28	2011-10-29	2011-07-30	2011-04-30	2011-01-29	2010-10-30	2010-07-31
Value	2.914	2.779	2.781	2.621	2.407	2.079	2.139	1.946	1.838	1.746	0.377	1.913	1.83	1.862	1.866	1.787	1.748	1.653	1.527	1.782	1.363	1.402	1.998	2.065	2.111	2.192	2.356	2.295	2.319	2.185	2.597	2.403	3.005	2.932	2.555	2.277	2.171	1.97	2.494	2.612	2.81	2.683
Percentage of DepreciationDepletionAndAmortization	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

Increase Decrease In Accounts Receivable

us-gaap:IncreaseDecreaseInAccountsReceivable

Period End	2020-10-31	2020-08-01	2020-04-30	2020-01-25	2019-10-26	2019-07-27	2019-04-30	2019-01-26	2018-10-27	2018-07-28	2018-04-30	2018-01-27	2017-10-28	2017-07-29	2017-04-30	2017-01-28	2016-10-29	2016-07-30	2016-04-30	2016-01-30	2015-10-31	2015-08-01	2015-04-30	2015-01-31	2014-11-01	2014-08-02	2014-04-30	2014-01-25	2013-10-26	2013-07-27	2013-04-30	2013-01-26	2012-10-27	2012-07-28	2012-04-30	2012-01-28	2011-10-29	2011-07-30	2011-04-30	2011-01-29	2010-10-30	2010-07-31
Value	-12.676	-30.439	46	-12.645	-2.157	11	-3.004	-0.556	20	-43.189	36	-9.212	5.137	-43.577	51	-2.991	-6.543	-23.019	17	-3.856	14	-5.549	-4.232	6.742	7.919	-8.667	-11.153	6.339	16	-0.044	-11.706	-16.958	-1.224	-6.297	32	-1.25	3.453	-22.012	-0.24	10	16	-21.189
Percentage of IncreaseDecreaseInAccountsReceivable	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

Increase Decrease In Inventories

us-gaap:IncreaseDecreaseInInventories

Period End	2020-10-31	2020-08-01	2020-04-30	2020-01-25	2019-10-26	2019-07-27	2019-04-30	2019-01-26	2018-10-27	2018-07-28	2018-04-30	2018-01-27	2017-10-28	2017-07-29	2017-04-30	2017-01-28	2016-10-29	2016-07-30	2016-04-30	2016-01-30	2015-10-31	2015-08-01	2015-04-30	2015-01-31	2014-11-01	2014-08-02	2014-04-30	2014-01-25	2013-10-26	2013-07-27	2013-04-30	2013-01-26	2012-10-27	2012-07-28	2012-04-30	2012-01-28	2011-10-29	2011-07-30	2011-04-30	2011-01-29	2010-10-30	2010-07-31
Value	6.249	-0.005	-19.621	12	-3.567	1.946	3.677	4.283	3.852	4.819	-19.519	1.288	4.022	11	-8.73	13	11	6.619	-8.948	-1.902	4.415	4.507	-9.385	-3.005	5.363	-4.258	-4.742	-5.188	-8.034	6.102	-1.036	18	0.242	0.966	-4.908	7.012	3.136	0.162	9.257	-0.049	0.844	7.157
Percentage of IncreaseDecreaseInInventories	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

Increase Decrease In Accounts Payable

us-gaap:IncreaseDecreaseInAccountsPayable

Period End	2020-10-31	2020-08-01	2020-04-30	2020-01-25	2019-10-26	2019-07-27	2019-04-30	2019-01-26	2018-10-27	2018-07-28	2018-04-30	2018-01-27	2017-10-28	2017-07-29	2017-04-30	2017-01-28	2016-10-29	2016-07-30	2016-04-30	2016-01-30	2015-10-31	2015-08-01	2015-04-30	2015-01-31	2014-11-01	2014-08-02	2014-04-30	2014-01-25	2013-10-26	2013-07-27	2013-04-30	2013-01-26	2012-10-27	2012-07-28	2012-04-30	2012-01-28	2011-10-29	2011-07-30	2011-04-30	2011-01-29	2010-10-30	2010-07-31
Value	2.31	-7.338	4.428	3.745	0.064	-5.11	3.591	-1.804	1.052	-9.893	12	-1.945	1.499	-6.238	6.013	-4.583	7.749	-6.336	6.752	-1.804	-1.354	-6.299	3.028	-2.773	5.863	-0.781	-1.229	3.361	-1.771	-2.599	0.367	0.347	2.345	-7.128	6.838	-6.242	7.068	-18.585	7.967	1.403	9.997	-8.438
Percentage of IncreaseDecreaseInAccountsPayable	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

Share Based Compensation

us-gaap:ShareBasedCompensation

Period End	2020-10-31	2020-08-01	2020-04-30	2020-01-25	2019-10-26	2019-07-27	2019-04-30	2019-01-26	2018-10-27	2018-07-28	2018-04-30	2018-01-27	2017-10-28	2017-07-29	2017-04-30	2017-01-28	2016-10-29	2016-07-30	2016-04-30	2016-01-30	2015-10-31	2015-08-01	2015-04-30	2015-01-31	2014-11-01	2014-08-02	2014-04-30	2014-01-25	2013-10-26	2013-07-27	2013-04-30	2013-01-26	2012-10-27	2012-07-28	2012-04-30	2012-01-28	2011-10-29	2011-07-30	2011-04-30	2011-01-29	2010-10-30	2010-07-31
Value	1914000.0	1595000.0	1476000.0	1767000.0	1418000.0	1566000.0	1386000.0	3082000.0	1230000.0	1287000.0	1057000.0	1291000.0	1211000.0	1397000.0	973000.0	923000.0	821000.0	992000.0	1392000.0	1088000.0	1043000.0	1039000.0	1054000.0	969000.0	899000.0	846000.0	935000.0	847000.0	930000.0	910000.0	841000.0	987000.0	802000.0	840000.0	877000.0	784000.0	781000.0	754000.0	634000.0	595000.0	576000.0	501000.0
Percentage of ShareBasedCompensation	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities

Period End	2020-10-31	2020-08-01	2019-10-26	2019-07-27	2018-01-27	2017-10-28	2017-07-29	2017-01-28	2016-10-29	2016-07-30	2011-07-30	2010-07-31
Value	1.53	-33.474	-11.083	-33.152	-9.195	-3.543	14	-7.751	-28.304	-0.894	17	21
Percentage of NetCashProvidedByUsedInInvestingActivities	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Revenues	1.7	-38.3	-13.3	-38.1	-14.4	-4.8	34.2	-14.6	-56.5	-2.5	28.2	57.3

Payments To Acquire Property Plant And Equipment

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment

Period End	2020-10-31	2020-08-01	2020-04-30	2020-01-25	2019-10-26	2019-07-27	2019-04-30	2019-01-26	2018-10-27	2018-07-28	2018-04-30	2018-01-27	2017-10-28	2017-07-29	2017-04-30	2017-01-28	2016-10-29	2016-07-30	2016-04-30	2016-01-30	2015-10-31	2015-08-01	2015-04-30	2015-01-31	2014-11-01	2014-08-02	2014-04-30	2014-01-25	2013-10-26	2013-07-27	2013-04-30	2013-01-26	2012-10-27	2012-07-28	2012-04-30	2012-01-28	2011-10-29	2011-07-30	2011-04-30	2011-01-29	2010-10-30	2010-07-31
Value	1.985	4.067	2.716	1.654	4.948	1.902	2.09	2.671	2.712	1.423	1.113	2.413	3.064	2.973	2.276	3.072	1.88	2.634	2.57	1.455	1.898	0.906	2.953	1.256	1.041	0.029	0.392	0.704	1.59	4.457	5.306	1.969	2.011	2.548	5.136	4.372	2.878	2.606	3.966	2.654	1.672	1.881
Percentage of PaymentsToAcquirePropertyPlantAndEquipment	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities

Period End	2020-10-31	2020-08-01	2020-04-30	2020-01-25	2019-10-26	2019-07-27	2019-04-30	2019-01-26	2018-10-27	2018-07-28	2018-04-30	2018-01-27	2017-10-28	2017-07-29	2017-04-30	2017-01-28	2016-10-29	2016-07-30	2011-07-30	2010-07-31
Value	-22000.0	-1670000.0	-914000.0	-266000.0	-75000.0	-575000.0	-68000.0	-101000.0	-206000.0	-809000.0	-51000.0	393000.0	342000.0	1336000.0	3106000.0	298000.0	-97000.0	163000.0	275000.0	135000.0
Percentage of NetCashProvidedByUsedInFinancingActivities	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0
Percentage of Revenues	-0.0	-1.9	0.0	-0.4	-0.1	-0.7	0.0	-0.1	-0.3	-1.0	-0.0	0.6	0.5	3.1	2.5	0.6	-0.2	0.5	0.4	0.4

Effective Income Tax Rate Continuing Operations

us-gaap:EffectiveIncomeTaxRateContinuingOperations

Period End	2020-10-31	2020-08-01	2020-04-30	2020-01-25	2019-10-26	2019-07-27	2019-04-30	2019-01-26	2018-10-27	2018-07-28	2018-04-30	2018-01-27	2017-12-31	2017-10-28	2017-07-29	2017-04-30	2017-01-28	2016-10-29	2016-07-30	2016-04-30	2016-01-30	2015-10-31	2015-08-01	2015-04-30	2015-01-31	2014-11-01	2014-08-02	2014-04-30	2014-01-25	2013-10-26	2013-07-27	2013-04-30	2013-01-26	2012-10-27	2012-07-28	2012-04-30	2012-01-28	2011-10-29	2011-07-30
Value	17.7	9.6	0.005	-0.284	0.117	0.104	-0.019	0.094	0.135	0.109	0.175	3.005	0.526	0.293	0.416	-0.012	-1.019	0.011	0.249	3.501	-0.225	0.367	0.378	-0.406	0.543	0.358	0.363	0.202	0.17	0.091	0.3	-0.057	5.536	0.34	0.334	0.018	0.23	0.32	0.357
Percentage of EffectiveIncomeTaxRateContinuingOperations	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber us-gaap:AwardType, us-gaap:PlanName

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber

avav:EmployeeAndNonemployeeStockOptions, avav:AmendedAndRestated2006EquityIncentivePlan

Period End	2020-04-30	2019-04-30	2018-04-30	2017-04-30	2016-04-30	2015-04-30	2014-04-30	2013-04-30	2012-04-30	2011-04-30
Value	334030.0	337030.0	339030.0	451620.0	683800.0	657120.0	713110.0	892210.0	692210.0	535410.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

avav:EmployeeAndNonemployeeStockOptions, avav:NonqualifiedStockOptionPlan1992

Period End	2020-04-30	2019-04-30	2018-04-30	2017-04-30	2016-04-30	2015-04-30	2014-04-30	2013-04-30	2012-04-30	2011-04-30
Value	1113.0	14302.0	18302.0	65640.0	92859.0	103580.0	105080.0	181570.0	239310.0	319570.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	0.3	4.2	5.4	14.5	13.6	15.8	14.7	20.4	34.6	59.7

Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice us-gaap:AwardType, us-gaap:PlanName

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice

avav:EmployeeAndNonemployeeStockOptions, avav:AmendedAndRestated2006EquityIncentivePlan

Period End	2020-04-30	2019-04-30	2018-04-30	2017-04-30	2016-04-30	2015-04-30	2014-04-30	2013-04-30	2012-04-30	2011-04-30
Value	25.19	25.25	25.29	24.92	24.46	23.96	23.2	23.67	25.01	23.51
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

avav:EmployeeAndNonemployeeStockOptions, avav:NonqualifiedStockOptionPlan1992

Period End	2020-04-30	2019-04-30	2018-04-30	2017-04-30	2016-04-30	2015-04-30	2014-04-30	2013-04-30	2012-04-30	2011-04-30
Value	0.59	0.59	0.59	0.59	0.59	0.59	0.59	0.52	0.49	0.49
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	2.3	2.3	2.3	2.4	2.4	2.5	2.5	2.2	2.0	2.1

Unrecognized Tax Benefits

us-gaap:UnrecognizedTaxBenefits

Period End	2020-04-30	2019-04-30	2018-04-30	2017-04-30	2016-04-30	2015-04-30	2014-04-30	2013-04-30	2012-04-30	2011-04-30
Value	14	12	11	9.856	9.905	8.19	6.334	5.083	4.507	4.655
Percentage of UnrecognizedTaxBenefits	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

Deferred Tax Assets Valuation Allowance

us-gaap:DeferredTaxAssetsValuationAllowance

Period End	2020-04-30	2019-04-30	2018-04-30	2017-04-30	2016-04-30	2015-04-30	2014-04-30
Value	14	11	8.568	5.416	4.511	3.127	1.298
Percentage of DeferredTaxAssetsValuationAllowance	100.0	100.0	100.0	100.0	100.0	100.0	100.0

avav:AmountOfNetIncomeLossAttributableToNoncontrollingInterest

Period End	2020-10-31	2020-08-01	2020-04-30	2020-01-25	2019-10-26	2019-07-27	2019-04-30	2019-01-26	2018-10-27	2018-07-28	2018-04-30	2018-01-27	2017-10-28	2017-07-29
Value	-22000.0	-37000.0	23000.0	-20000.0	4000.0	-11000.0	-21000.0	19000.0	7000.0	14000.0	-22000.0	9000.0	206000.0	23000.0
Percentage of AmountOfNetIncomeLossAttributableToNoncontrollingInterest	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

avav:AmountOfNetIncomeLossAttributableToNoncontrollingInterest us-gaap:StatementEquityComponents

us-gaap:NoncontrollingInterest

Period End	2020-10-31	2019-10-26	2019-07-27	2018-07-28
Value	22000.0	-4000.0	11000.0	14000.0
Percentage of AmountOfNetIncomeLossAttributableToNoncontrollingInterest	-100.0	-100.0	-100.0	100.0

avav:BusinessCombinationsAdditionalCashConsideration us-gaap:BusinessAcquisition

avav:BusinessCombinationsAdditionalCashConsideration

avav:TelerobGesellschaftFrFernhantierungstechnikGmbh

Period End	2020-12-03
Value	6000000.0
Percentage of BusinessCombinationsAdditionalCashConsideration	100.0

avav:DeferredIncomeTaxNoncashExpenseBenefit

Period End	2020-10-31	2020-08-01	2020-04-30	2020-01-25	2019-10-26	2019-07-27	2019-04-30	2019-01-26	2018-10-27	2018-07-28	2018-04-30	2018-01-27	2017-10-28	2017-07-29	2017-04-30	2017-01-28	2016-04-30	2016-01-30	2015-10-31	2015-08-01	2015-04-30	2015-01-31	2014-11-01	2014-08-02	2014-04-30	2014-01-25	2013-10-26	2013-07-27	2013-04-30	2013-01-26	2012-10-27	2012-07-28
Value	-282000.0	-339000.0	4365000.0	-277000.0	-320000.0	-349000.0	6006000.0	-600000.0	-308000.0	-306000.0	3660000.0	1268000.0	-496000.0	-597000.0	646000.0	-369000.0	-2930000.0	-197000.0	12000.0	203000.0	-3180000.0	-244000.0	-249000.0	291000.0	-2777000.0	-100000.0	-210000.0	-23000.0	4258000.0	-277000.0	-172000.0	42000.0
Percentage of DeferredIncomeTaxNoncashExpenseBenefit	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

avav:IncreaseDecreaseInUnbilledContractsReceivableAndRetentions

Period End	2020-10-31	2020-08-01	2020-04-30	2020-01-25	2019-10-26	2019-07-27	2019-04-30	2019-01-26	2018-10-27	2018-07-28	2018-04-30	2018-01-27	2017-10-28	2017-07-29	2017-04-30	2017-01-28	2016-10-29	2016-07-30	2016-04-30	2016-01-30	2015-10-31	2015-08-01	2015-04-30	2015-01-31	2014-11-01	2014-08-02	2014-04-30	2014-01-25	2013-10-26	2013-07-27	2013-04-30	2013-01-26	2012-10-27	2012-07-28	2012-04-30	2012-01-28	2011-10-29	2011-07-30	2011-04-30	2011-01-29	2010-10-30	2010-07-31
Value	-3.218	-2.046	-1.574	15	14	-5.112	1.415	5.978	-14.216	42	-11.744	11	2.741	-3.367	-0.7	-2.05	2.377	-4.406	8.459	-1.358	-2.2	-3.358	9.011	1.242	-0.555	-3.271	2.293	1.38	-2.463	-1.585	-4.105	-5.655	-2.194	-3.776	2.527	2.831	8.277	-8.567	2.397	2.992	0.743	-2.876
Percentage of IncreaseDecreaseInUnbilledContractsReceivableAndRetentions	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

avav:NonCashLeaseExpenseIncome

Period End	2020-10-31	2020-08-01	2019-10-26	2019-07-27
Value	1203000.0	1190000.0	2506000.0	-251000.0
Percentage of NonCashLeaseExpenseIncome	100.0	100.0	100.0	100.0

avav:NonCashOrPartOfNonCashChangeInForeignCurrencyTranslationAdjustments

Period End	2020-10-31	2020-08-01	2020-04-30	2020-01-25	2019-10-26	2019-07-27	2019-04-30	2019-01-26	2018-10-27	2018-07-28	2018-04-30
Value	0	75000.0	209000.0	-112000.0	10000.0	169000.0	-2000.0	-1000.0	-11000.0	-20000.0	-26000.0
Percentage of NonCashOrPartOfNonCashChangeInForeignCurrencyTranslationAdjustments	0.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

avav:NoncashOrPartNoncashAcquisitionFixedAssetsAcquiredIncludedInAccountsPayable

Period End	2020-10-31	2020-08-01	2020-04-30	2020-01-25	2019-10-26	2019-07-27	2019-04-30	2019-01-26	2018-10-27	2018-07-28	2018-04-30	2018-01-27	2017-10-28	2017-07-29	2017-04-30	2017-01-28	2016-10-29	2016-07-30
Value	175000.0	643000.0	1162000.0	-498000.0	-492000.0	1253000.0	752000.0	-695000.0	158000.0	595000.0	47000.0	-556000.0	244000.0	644000.0	321000.0	-296000.0	383000.0	321000.0
Percentage of NoncashOrPartNoncashAcquisitionFixedAssetsAcquiredIncludedInAccountsPayable	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

avav:OtherComprehensiveIncomeLossUnrealizedNetOfTaxes us-gaap:StatementEquityComponents

avav:OtherComprehensiveIncomeLossUnrealizedNetOfTaxes

us-gaap:AccumulatedOtherComprehensiveIncome

Period End	2020-10-31	2020-08-01	2019-04-30	2019-01-26	2018-10-27	2018-07-28	2018-04-30	2018-01-27	2017-10-28	2017-07-29
Value	-9000.0	-52000.0	0	0	0	57000.0	28000.0	13000.0	27000.0	2000.0
Percentage of OtherComprehensiveIncomeLossUnrealizedNetOfTaxes	100.0	100.0	0.0	0.0	0.0	100.0	100.0	100.0	100.0	100.0

avav:RevenuePerformanceObligationSatisfiedOverTime

Period End	2020-10-31
Value	40.0
Percentage of RevenuePerformanceObligationSatisfiedOverTime	100.0

avav:RevenueRemainingPerformanceObligationAggregateImpactOfAdjustmentsInContractEstimatesOnRevenueRelatedToPerformanceObligationsSatisfiedOrPartiallySatisfiedInPreviousPeriods

Period End	2020-10-31
Value	1118000.0
Percentage of RevenueRemainingPerformanceObligationAggregateImpactOfAdjustmentsInContractEstimatesOnRevenueRelatedToPerformanceObligationsSatisfiedOrPartiallySatisfiedInPreviousPeriods	100.0

avav:StandardProductWarrantyAccrualWarrantiesIssuedAndPreexistingIncreaseDecrease

Period End	2020-10-31	2020-08-01	2020-04-30	2020-01-25	2019-10-26	2019-07-27	2019-04-30	2019-01-26	2018-10-27	2018-07-28	2018-04-30	2018-01-27	2017-10-28	2017-07-29	2017-04-30	2017-01-28	2016-10-29	2016-07-30	2016-04-30	2016-01-30	2015-10-31	2015-08-01	2015-04-30	2015-01-31	2014-11-01	2014-08-02	2014-04-30	2014-01-25	2013-10-26	2013-07-27	2013-04-30	2013-01-26	2012-10-27	2012-07-28	2012-04-30	2012-01-28	2011-10-29	2011-07-30
Value	310000.0	451000.0	789000.0	250000.0	534000.0	549000.0	-203000.0	53000.0	-249000.0	611000.0	-629000.0	1347000.0	719000.0	447000.0	847000.0	245000.0	144000.0	192000.0	1776000.0	1032000.0	1001000.0	707000.0	931000.0	579000.0	1027000.0	382000.0	84000.0	534000.0	332000.0	486000.0	461000.0	500000.0	678000.0	530000.0	2247000.0	785000.0	900000.0	352000.0
Percentage of StandardProductWarrantyAccrualWarrantiesIssuedAndPreexistingIncreaseDecrease	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:AccretionAmortizationOfDiscountsAndPremiumsInvestments

Period End	2020-10-31	2020-08-01	2020-04-30	2020-01-25	2019-10-26	2019-07-27	2019-04-30	2019-01-26	2018-10-27	2018-07-28	2018-04-30	2018-01-27	2017-10-28	2017-07-29	2017-04-30	2017-01-28	2016-10-29	2016-07-30	2016-04-30	2016-01-30	2015-10-31	2015-08-01	2015-04-30	2015-01-31	2014-11-01	2014-08-02
Value	-31000.0	43000.0	132000.0	307000.0	457000.0	527000.0	565000.0	482000.0	344000.0	115000.0	-174000.0	-353000.0	-423000.0	-474000.0	-555000.0	-568000.0	-598000.0	-661000.0	-789000.0	-940000.0	-997000.0	-1149000.0	-1144000.0	-1177000.0	-1059000.0	-1152000.0
Percentage of AccretionAmortizationOfDiscountsAndPremiumsInvestments	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation

Period End	2020-10-31	2020-08-01	2020-04-30	2020-01-25	2019-10-26	2019-07-27	2019-04-30	2019-01-26	2018-10-27	2018-07-28
Value	22000.0	1756000.0	53000.0	266000.0	75000.0	668000.0	61000.0	58000.0	156000.0	819000.0
Percentage of AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital

Period End	2020-10-31	2020-08-01	2020-04-30	2020-01-25	2019-10-26	2019-07-27	2019-04-30	2019-01-26	2018-10-27	2018-07-28
Value	22000.0	1756000.0	53000.0	266000.0	75000.0	668000.0	61000.0	58000.0	156000.0	819000.0
Percentage of AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:Parent

Period End	2020-10-31	2020-08-01	2020-04-30	2020-01-25	2019-10-26	2019-07-27	2019-04-30	2019-01-26	2018-10-27	2018-07-28
Value	22000.0	1756000.0	53000.0	266000.0	75000.0	668000.0	61000.0	58000.0	156000.0	819000.0
Percentage of AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:BusinessAcquisitionsProFormaRevenue us-gaap:BusinessAcquisition

us-gaap:BusinessAcquisitionsProFormaRevenue

avav:PulseAerospaceLlc

Period End	2020-04-30	2020-01-25	2019-10-26	2019-07-27	2019-01-26	2018-10-27	2018-07-28
Value	-225.693	61	83	87	75	73	79
Percentage of BusinessAcquisitionsProFormaRevenue	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:BusinessCombinationSeparatelyRecognizedTransactionsNetGainsAndLosses us-gaap:BusinessAcquisition, us-gaap:IncomeStatementLocation

us-gaap:BusinessCombinationSeparatelyRecognizedTransactionsNetGainsAndLosses

avav:PulseAerospaceLlc, us-gaap:SellingGeneralAndAdministrativeExpenses

Period End	2020-04-30
Value	0
Percentage of BusinessCombinationSeparatelyRecognizedTransactionsNetGainsAndLosses	0.0

us-gaap:CashProvidedByUsedInInvestingActivitiesDiscontinuedOperations

Period End	2020-04-30	2020-01-25	2019-10-26	2019-07-27	2019-04-30	2019-01-26	2018-10-27	2018-07-28	2018-04-30	2018-01-27	2017-10-28	2017-07-29
Value	0	0	0	0	21000.0	0	-21000.0	-431000.0	-482000.0	-155000.0	-314000.0	-268000.0
Percentage of CashProvidedByUsedInInvestingActivitiesDiscontinuedOperations	0.0	0.0	0.0	0.0	100.0	0.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:CashProvidedByUsedInOperatingActivitiesDiscontinuedOperations

Period End	2020-04-30	2020-01-25	2019-10-26	2019-07-27	2019-04-30	2019-01-26	2018-10-27	2018-07-28	2018-04-30	2018-01-27	2017-10-28	2017-07-29
Value	0	0	0	0	-436000.0	-62000.0	-579000.0	-6609000.0	2489000.0	2159000.0	-1838000.0	-4037000.0
Percentage of CashProvidedByUsedInOperatingActivitiesDiscontinuedOperations	0.0	0.0	0.0	0.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:DisposalGroupIncludingDiscontinuedOperationRevenue us-gaap:DisposalGroupClassification, us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations, us-gaap:IncomeStatementLocation

us-gaap:DisposalGroupIncludingDiscontinuedOperationRevenue

us-gaap:DiscontinuedOperationsDisposedOfBySale, avav:EesBusiness, us-gaap:OtherIncome

Period End	2020-10-31	2020-08-01	2020-04-30	2020-01-25	2019-10-26	2019-07-27	2019-04-30	2019-01-26	2018-10-27	2018-07-28
Value	0.0	0.038	0.006	0.057	0.045	0.444	0.745	0.657	1.221	0.399
Percentage of DisposalGroupIncludingDiscontinuedOperationRevenue	0.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:EquityMethodInvestmentOtherThanTemporaryImpairment us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

us-gaap:EquityMethodInvestmentOtherThanTemporaryImpairment

avav:LoonLlc

Period End	2020-10-31
Value	8363000.0
Percentage of EquityMethodInvestmentOtherThanTemporaryImpairment	100.0

us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarnings1 us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:IncomeStatementLocation

us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarnings1

us-gaap:FairValueInputsLevel3, us-gaap:CostOfSales

Period End	2020-04-30
Value	380000.0
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarnings1	100.0

us-gaap:FairValueInputsLevel3, us-gaap:ResearchAndDevelopmentExpense

Period End	2020-04-30
Value	0
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarnings1	0.0

us-gaap:FairValueInputsLevel3, us-gaap:SellingGeneralAndAdministrativeExpenses

Period End	2020-04-30
Value	0
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarnings1	0.0

us-gaap:ForeignCurrencyTransactionGainLossUnrealized

Period End	2020-10-31	2020-08-01	2019-10-26	2019-07-27	2019-04-30	2019-01-26	2018-10-27	2018-07-28	2018-04-30	2018-01-27	2017-10-28	2017-07-29	2017-04-30	2017-01-28	2016-10-29	2016-07-30	2016-04-30	2016-01-30	2015-10-31	2015-08-01	2015-04-30	2015-01-31	2014-11-01	2014-08-02
Value	-1000.0	-1000.0	0	-1000.0	-48000.0	-3000.0	11000.0	2000.0	51000.0	-72000.0	2000.0	106000.0	-12000.0	-3000.0	-43000.0	-226000.0	0	0	-5000.0	-58000.0	-219000.0	-80000.0	-98000.0	-183000.0
Percentage of ForeignCurrencyTransactionGainLossUnrealized	100.0	100.0	0.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	0.0	0.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:GainLossOnSaleOfInvestments

Period End	2020-10-31	2020-08-01
Value	0	11000.0
Percentage of GainLossOnSaleOfInvestments	0.0	100.0

us-gaap:GainLossOnSaleOfPropertyPlantEquipment

Period End	2020-10-31	2020-08-01	2020-04-30	2020-01-25	2019-10-26	2019-07-27	2019-04-30	2018-04-30	2018-01-27	2017-04-30	2017-01-28	2016-04-30	2012-04-30	2011-04-30
Value	0	-2000.0	0	-4000.0	0	75000.0	-25000.0	-5000.0	0	0	-44000.0	-10000.0	-2000.0	-3000.0
Percentage of GainLossOnSaleOfPropertyPlantEquipment	0.0	100.0	0.0	100.0	0.0	100.0	100.0	100.0	0.0	0.0	100.0	100.0	100.0	100.0

us-gaap:IncomeLossFromEquityMethodInvestments

Period End	2020-10-31	2020-08-01	2020-04-30	2020-01-25	2019-10-26	2019-07-27	2019-04-30	2019-01-26	2018-10-27	2018-07-28	2018-04-30	2018-01-27	2017-07-29	2017-04-30	2017-01-28	2016-10-29	2016-07-30	2016-04-30	2016-01-30	2015-10-31	2015-08-01	2015-04-30	2015-01-31	2014-11-01	2014-08-02
Value	-9522000.0	-1288000.0	-2077000.0	-1200000.0	-863000.0	-1347000.0	-1873000.0	-717000.0	-752000.0	-602000.0	-865000.0	-418000.0	-1283000.0	0	-8000.0	-39000.0	-72000.0	110000.0	-126000.0	-57000.0	-65000.0	-88000.0	-54000.0	-48000.0	-50000.0
Percentage of IncomeLossFromEquityMethodInvestments	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	0.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:IncomeLossFromEquityMethodInvestments us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:IncomeStatementLocation

avav:Hapsmobile, avav:EquityMethodInvestmentLossNetOfTax

Period End	2020-10-31	2020-08-01	2019-10-26	2019-04-30	2019-01-26	2018-10-27
Value	0	280000.0	863000.0	1873000.0	717000.0	752000.0
Percentage of IncomeLossFromEquityMethodInvestments	-0.0	-21.7	-100.0	-100.0	-100.0	-100.0

avav:Hapsmobile, us-gaap:EquityMethodInvestments

Period End	2020-10-31	2020-08-01	2020-01-25	2019-10-26	2019-07-27	2019-01-26	2018-10-27	2018-07-28
Value	-9522000.0	-1008000.0	-1200000.0	-863000.0	-1347000.0	-717000.0	-752000.0	-602000.0
Percentage of IncomeLossFromEquityMethodInvestments	100.0	78.3	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:IncreaseDecreaseInOtherCurrentLiabilities

Period End	2020-10-31	2020-08-01	2020-04-30	2020-01-25	2019-10-26	2019-07-27	2019-04-30	2019-01-26	2018-10-27	2018-07-28	2018-04-30	2018-01-27	2017-10-28	2017-07-29	2017-04-30	2017-01-28	2016-10-29	2016-07-30	2016-04-30	2016-01-30	2015-10-31	2015-08-01
Value	4268000.0	-15004000.0	233000.0	12530000.0	-59000.0	-4524000.0	-1445000.0	3586000.0	-2387000.0	-3797000.0	8025000.0	5136000.0	-1613000.0	-3676000.0	3564000.0	3423000.0	-4339000.0	-3594000.0	6267000.0	2671000.0	-3651000.0	-3766000.0
Percentage of IncreaseDecreaseInOtherCurrentLiabilities	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets

Period End	2020-10-31	2020-08-01	2020-04-30	2020-01-25	2019-10-26	2019-07-27	2019-04-30	2019-01-26	2018-10-27	2018-07-28	2018-04-30	2018-01-27	2017-10-28	2017-07-29	2017-04-30	2017-01-28	2016-10-29	2016-07-30	2016-04-30	2016-01-30	2015-10-31	2015-08-01
Value	1353000.0	-324000.0	-615000.0	-1267000.0	435000.0	616000.0	610000.0	960000.0	698000.0	133000.0	53000.0	-4000.0	-91000.0	-377000.0	276000.0	635000.0	538000.0	17000.0	-62000.0	-336000.0	591000.0	-710000.0
Percentage of IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:IncrementalCommonSharesAttributableToShareBasedPaymentArrangements

Period End	2020-04-30	2020-01-25	2019-10-26	2019-07-27	2019-04-30	2019-01-26	2018-10-27	2018-07-28	2018-04-30	2018-01-27	2017-10-28	2017-07-29	2017-04-30	2017-01-28	2016-10-29	2016-07-30	2016-04-30	2016-01-30	2015-10-31	2015-08-01	2015-01-31	2014-04-30	2014-01-25	2013-10-26	2013-04-30	2013-01-26	2012-10-27	2012-04-30	2012-01-28	2011-10-29
Value	-3448.0	-3013.0	257450.0	324730.0	-11839.0	394150.0	431430.0	435710.0	11258.0	22776.0	355040.0	0	248690.0	0	0	0	18453.0	193330.0	162500.0	0	218850.0	-79796.0	562220.0	423960.0	-19541.0	265460.0	353460.0	24230.0	519210.0	492020.0
Percentage of IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	0.0	100.0	0.0	0.0	0.0	100.0	100.0	100.0	0.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:InventoryWriteDown

Period End	2020-04-30	2020-01-25	2019-10-26
Value	1.57	0.617	2.612
Percentage of InventoryWriteDown	100.0	100.0	100.0

us-gaap:InventoryWriteDown us-gaap:IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperations

avav:UasQuantixSolution

Period End	2020-04-30	2019-10-26
Value	0.0	2600
Percentage of InventoryWriteDown	0.0	99540.6

us-gaap:InvestmentIncomeInterest

Period End	2020-10-31	2020-08-01	2020-04-30	2020-01-25	2019-10-26	2019-07-27	2019-04-30	2019-01-26	2018-10-27	2018-07-28	2018-04-30	2018-01-27	2017-10-28	2017-07-29	2017-04-30	2017-01-28	2016-10-29	2016-07-30	2016-04-30	2016-01-30	2015-10-31	2015-08-01	2015-04-30	2015-01-31	2014-11-01	2014-08-02	2014-04-30	2014-01-25	2013-10-26	2013-07-27	2013-04-30	2013-01-26	2012-10-27	2012-07-28	2012-04-30	2012-01-28	2011-10-29	2011-07-30	2011-04-30	2011-01-29	2010-10-30	2010-07-31
Value	115000.0	208000.0	1111000.0	1122000.0	1266000.0	1329000.0	1426000.0	1272000.0	1068000.0	906000.0	751000.0	545000.0	432000.0	512000.0	456000.0	390000.0	397000.0	375000.0	359000.0	181000.0	268000.0	224000.0	253000.0	224000.0	193000.0	212000.0	258000.0	197000.0	195000.0	205000.0	228000.0	164000.0	162000.0	172000.0	149000.0	129000.0	106000.0	78000.0	62000.0	49000.0	45000.0	121000.0
Percentage of InvestmentIncomeInterest	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:LeaseCost

Period End	2020-10-31	2020-08-01	2019-10-26	2019-07-27
Value	2623000.0	1263000.0	1491000.0	1329000.0
Percentage of LeaseCost	100.0	100.0	100.0	100.0

us-gaap:NetCashProvidedByUsedInInvestingActivitiesContinuingOperations

Period End	2020-04-30	2020-01-25	2019-10-26	2019-07-27	2019-04-30	2019-01-26	2018-10-27	2018-07-28	2018-04-30	2018-01-27	2017-10-28	2017-07-29	2017-04-30	2017-01-28	2016-10-29	2016-07-30	2016-04-30	2016-01-30	2015-10-31	2015-08-01	2015-04-30	2015-01-31	2014-11-01	2014-08-02	2014-04-30	2014-01-25	2013-10-26	2013-07-27	2013-04-30	2013-01-26	2012-10-27	2012-07-28	2012-04-30	2012-01-28	2011-10-29	2011-07-30	2011-04-30	2011-01-29
Value	109	-6.127	-11.083	-33.152	3.773	-5.963	-16.348	30	-9.347	-9.04	-3.229	15	-0.405	-7.751	-28.304	-0.894	-4.673	-22.677	-2.991	13	-8.263	-3.939	-17.341	5.723	2.518	12	-1.848	2.16	-7.632	-7.077	-5.089	6.691	-15.676	-28.017	8.889	17	-8.02	-44.747
Percentage of NetCashProvidedByUsedInInvestingActivitiesContinuingOperations	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:NetCashProvidedByUsedInOperatingActivitiesContinuingOperations

Period End	2020-04-30	2020-01-25	2019-10-26	2019-07-27	2019-04-30	2019-01-26	2018-10-27	2018-07-28	2018-04-30	2018-01-27	2017-10-28	2017-07-29	2017-04-30	2017-01-28	2016-10-29	2016-07-30	2016-04-30	2016-01-30	2015-10-31	2015-08-01	2015-04-30	2015-01-31	2014-11-01	2014-08-02	2014-04-30	2014-01-25	2013-10-26	2013-07-27	2013-04-30	2013-01-26	2012-10-27	2012-07-28	2012-04-30	2012-01-28	2011-10-29	2011-07-30	2011-04-30	2011-01-29
Value	10	7.147	4.806	3.113	20	4.24	-2.379	5.036	38	1.838	4.675	25	3.925	-8.145	-5.036	-1.243	6.25	17	-11.605	-11.304	25	3.582	-4.407	14	25	13	3.503	-13.176	18	0.277	22	-17.77	13	-4.917	8.315	1.456	30	7.036
Percentage of NetCashProvidedByUsedInOperatingActivitiesContinuingOperations	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:NetIncomeLossFromContinuingOperationsAvailableToCommonShareholdersBasic

Period End	2020-04-30	2020-01-31	2019-10-31	2019-07-31	2019-04-30	2019-01-31	2018-10-31	2018-07-31	2018-04-30	2018-01-27	2017-10-28	2017-07-29	2017-04-30	2017-01-28	2016-10-29	2016-07-30
Value	17	-1.008	7.501	17	6.097	8.431	7.047	20	20	-0.96	6.689	-3.364	28	-0.852	-2.603	-8.381
Percentage of NetIncomeLossFromContinuingOperationsAvailableToCommonShareholdersBasic	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:NetIncomeLossIncludingPortionAttributableToNonredeemableNoncontrollingInterest

Period End	2020-10-31	2020-08-01	2020-01-25	2019-10-26	2019-07-27	2019-01-26	2018-10-27
Value	2.131	10	-1.028	7.505	17	8.35	6.05
Percentage of NetIncomeLossIncludingPortionAttributableToNonredeemableNoncontrollingInterest	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:NetIncomeLossIncludingPortionAttributableToNonredeemableNoncontrollingInterest us-gaap:StatementEquityComponents

us-gaap:Parent

Period End	2020-10-31	2019-10-26	2019-07-27	2018-07-28
Value	2.094	7.501	17	27
Percentage of NetIncomeLossIncludingPortionAttributableToNonredeemableNoncontrollingInterest	98.3	99.9	100.1	0.0

us-gaap:OperatingLeaseCost

Period End	2020-10-31	2020-08-01	2019-10-26	2019-07-27
Value	2393000.0	1190000.0	1114000.0	1120000.0
Percentage of OperatingLeaseCost	100.0	100.0	100.0	100.0

us-gaap:OperatingLeasePayments

Period End	2020-10-31	2020-08-01	2019-10-26	2019-07-27
Value	2727000.0	1400000.0	1344000.0	1389000.0
Percentage of OperatingLeasePayments	100.0	100.0	100.0	100.0

us-gaap:OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent

Period End	2020-10-31	2020-08-01	2019-04-30	2019-01-26	2018-10-27	2018-07-28	2018-04-30	2018-01-27	2017-10-28	2017-07-29	2017-04-30	2017-01-28	2016-10-29	2016-07-30	2016-04-30	2016-01-30	2015-10-31	2015-08-01	2015-04-30	2015-01-31	2014-11-01	2014-08-02	2014-04-30	2014-01-25	2013-10-26	2013-07-27	2013-04-30	2013-01-26	2012-10-27	2012-07-28	2012-04-30	2012-01-28	2011-10-29	2011-07-30
Value	-9000.0	-52000.0	0	0	0	57000.0	28000.0	13000.0	26000.0	2000.0	42000.0	-11000.0	25000.0	18000.0	-7000.0	7000.0	25000.0	2000.0	83000.0	-582000.0	-644000.0	48000.0	355000.0	58000.0	77000.0	-48000.0	-53000.0	15000.0	-10000.0	37000.0	3000.0	44000.0	41000.0	2000.0
Percentage of OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent	100.0	100.0	0.0	0.0	0.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome

Period End	2020-10-31	2020-08-01	2019-04-30	2019-01-26	2018-10-27	2018-07-28
Value	-9000.0	-52000.0	0	0	0	57000.0
Percentage of OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent	100.0	100.0	0.0	0.0	0.0	100.0

us-gaap:Parent

Period End	2020-10-31	2020-08-01	2019-04-30	2019-01-26	2018-10-27	2018-07-28
Value	-9000.0	-52000.0	0	0	0	57000.0
Percentage of OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent	100.0	100.0	0.0	0.0	0.0	100.0

us-gaap:OtherComprehensiveIncomeAvailableforsaleSecuritiesTaxPortionAttributableToParent

Period End	2020-10-31	2020-08-01	2019-04-30	2019-01-26	2018-10-27	2018-07-28	2018-04-30	2018-01-27	2017-10-28	2017-07-29	2017-04-30	2017-01-28	2016-10-29	2016-07-30	2016-04-30	2016-01-30	2015-10-31	2015-08-01	2015-04-30	2015-01-31	2014-11-01	2014-08-02	2013-10-26	2013-07-27
Value	-3000.0	4000.0	0	0	0	51000.0	-4000.0	10000.0	17000.0	4000.0	37000.0	-23000.0	17000.0	12000.0	-5000.0	5000.0	17000.0	1000.0	55000.0	-388000.0	-429000.0	32000.0	50000.0	-32000.0
Percentage of OtherComprehensiveIncomeAvailableforsaleSecuritiesTaxPortionAttributableToParent	100.0	100.0	0.0	0.0	0.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:OtherComprehensiveIncomeAvailableforsaleSecuritiesTaxPortionAttributableToParent us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome

Period End	2020-10-31	2020-08-01
Value	-3000.0	4000.0
Percentage of OtherComprehensiveIncomeAvailableforsaleSecuritiesTaxPortionAttributableToParent	100.0	100.0

us-gaap:OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentBeforeTaxPortionAttributableToParent

Period End	2020-10-31	2020-08-01	2020-04-30	2020-01-25	2019-10-26	2019-07-27	2019-04-30	2019-01-26	2018-10-27	2018-07-28
Value	0	75000.0	209000.0	-112000.0	10000.0	169000.0	-2000.0	-1000.0	-11000.0	-20000.0
Percentage of OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentBeforeTaxPortionAttributableToParent	0.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentBeforeTaxPortionAttributableToParent us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome

Period End	2020-10-31	2020-08-01	2020-04-30	2020-01-25	2019-10-26	2019-07-27	2019-04-30	2019-01-26	2018-10-27	2018-07-28
Value	0	75000.0	209000.0	-112000.0	10000.0	169000.0	-2000.0	-1000.0	-11000.0	-20000.0
Percentage of OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentBeforeTaxPortionAttributableToParent	0.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:Parent

Period End	2020-08-01	2020-04-30	2020-01-25	2019-10-26	2019-07-27	2019-04-30	2019-01-26	2018-10-27	2018-07-28
Value	75000.0	209000.0	-112000.0	10000.0	169000.0	-2000.0	-1000.0	-11000.0	-20000.0
Percentage of OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentBeforeTaxPortionAttributableToParent	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent

Period End	2020-10-31	2020-08-01	2020-04-30	2020-01-25	2019-10-26	2019-07-27	2019-04-30	2019-01-26	2018-10-27	2018-07-28	2018-04-30	2018-01-27
Value	0	75000.0	209000.0	-112000.0	10000.0	169000.0	-2000.0	-1000.0	-11000.0	-20000.0	-26000.0	62000.0
Percentage of OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent	0.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax

Period End	2020-10-31	2020-08-01	2019-04-30	2019-01-26	2018-04-30	2018-01-27
Value	-9000.0	-52000.0	0	0	-28000.0	-13000.0
Percentage of OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	100.0	100.0	0.0	0.0	100.0	100.0

us-gaap:OtherComprehensiveIncomeLossTax us-gaap:StatementEquityComponents

us-gaap:OtherComprehensiveIncomeLossTax

us-gaap:AccumulatedOtherComprehensiveIncome

Period End	2020-10-31	2020-08-01	2020-04-30	2020-01-25	2019-10-26	2019-07-27	2019-04-30
Value	-3000.0	4000.0	0	0	0	0	0
Percentage of OtherComprehensiveIncomeLossTax	100.0	100.0	0.0	0.0	0.0	0.0	0.0

us-gaap:PaymentsRelatedToTaxWithholdingForShareBasedCompensation

Period End	2020-10-31	2020-08-01	2020-04-30	2020-01-25	2019-10-26	2019-07-27	2019-04-30	2019-01-26	2018-10-27	2018-07-28	2018-04-30	2018-01-27	2017-10-28	2017-07-29	2016-04-30	2015-04-30
Value	22000.0	1756000.0	53000.0	266000.0	75000.0	668000.0	61000.0	58000.0	156000.0	819000.0	8000.0	76000.0	101000.0	212000.0	0	0
Percentage of PaymentsRelatedToTaxWithholdingForShareBasedCompensation	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	0.0	0.0

us-gaap:PaymentsToAcquireAvailableForSaleSecuritiesDebt

Period End	2020-10-31	2020-08-01	2019-10-26	2019-07-27
Value	46	69	2.254	2.693
Percentage of PaymentsToAcquireAvailableForSaleSecuritiesDebt	100.0	100.0	100.0	100.0

us-gaap:PaymentsToAcquireBusinessesGross us-gaap:BusinessAcquisition

us-gaap:PaymentsToAcquireBusinessesGross

avav:PulseAerospaceLlc

Period End	2020-02-26	2020-02-20	2019-06-10
Value	2.5	2.5	18
Percentage of PaymentsToAcquireBusinessesGross	100.0	100.0	100.0

avav:TelerobGesellschaftFrFernhantierungstechnikGmbh

Period End	2020-12-03
Value	37
Percentage of PaymentsToAcquireBusinessesGross	0.0

us-gaap:PaymentsToAcquireEquityMethodInvestments

Period End	2020-10-31	2020-08-01	2019-10-26	2019-07-27	2018-04-30	2016-04-30	2016-01-30	2015-10-31	2015-08-01	2015-04-30	2015-01-31	2014-11-01	2014-08-02
Value	0.0	1.173	0.0	4.569	1.407	0.0	0.109	0.101	0.085	0.11	0.099	-0.024	0.21
Percentage of PaymentsToAcquireEquityMethodInvestments	0.0	100.0	0.0	100.0	100.0	0.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:PaymentsToAcquireHeldToMaturitySecurities

Period End	2020-04-30	2020-01-25	2019-10-26	2019-07-27	2019-04-30	2019-01-26	2018-10-27	2018-07-28	2018-04-30	2018-01-27	2017-10-28	2017-07-29	2017-04-30	2017-01-28	2016-10-29	2016-07-30	2016-04-30	2016-01-30	2015-10-31	2015-08-01	2015-04-30	2015-01-31	2014-11-01	2014-08-02	2014-04-30
Value	14	-6.631	98	70	56	41	87	81	69	62	46	41	26	43	51	27	19	32	20	22	8.727	20	39	28	8.699
Percentage of PaymentsToAcquireHeldToMaturitySecurities	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:PaymentsToAcquireLimitedPartnershipInterests us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

us-gaap:PaymentsToAcquireLimitedPartnershipInterests

avav:LimitedPartnershipFund

Period End	2020-10-31	2020-07-15	2020-08-01
Value	3880000.0	1173000.0	3880000.0
Percentage of PaymentsToAcquireLimitedPartnershipInterests	100.0	100.0	100.0

us-gaap:ProceedsFromSaleAndMaturityOfHeldToMaturitySecurities

Period End	2020-04-30	2020-01-25	2019-10-26	2019-07-27	2019-04-30	2019-01-26	2018-10-27	2018-07-28	2018-04-30	2018-01-27	2017-10-28	2017-07-29	2017-04-30	2017-01-28	2016-10-29	2016-07-30	2016-04-30	2016-01-30	2015-10-31	2015-08-01	2015-04-30	2015-01-31	2014-11-01	2014-08-02	2014-04-30	2014-01-25	2013-10-26	2013-07-27	2013-04-30	2013-01-26	2012-10-27	2012-07-28	2012-04-30
Value	19	7.078	94	65	69	38	74	78	63	58	46	59	28	39	25	28	17	11	18	37	3.229	85	-16.662	-2.924	54	13	0.492	6.442	-2.676	-1.221	-3.153	9.064	-10.54
Percentage of ProceedsFromSaleAndMaturityOfHeldToMaturitySecurities	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:ProceedsFromSaleOfAvailableForSaleSecuritiesDebt

Period End	2020-10-31	2020-08-01	2020-04-30	2019-04-30
Value	50	41	159	0.0
Percentage of ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	100.0	100.0	100.0	0.0

us-gaap:ProceedsFromStockOptionsExercised

Period End	2020-10-31	2020-08-01	2020-04-30	2020-01-25	2019-10-26	2019-07-27	2019-04-30	2019-01-26	2018-10-27	2018-07-28	2018-04-30	2018-01-27	2017-10-28	2017-07-29	2017-04-30	2017-01-28	2016-10-29	2016-07-30	2016-04-30	2016-01-30	2015-10-31	2015-08-01	2015-04-30	2015-01-31	2014-11-01	2014-08-02	2014-04-30	2014-01-25	2013-10-26	2013-07-27	2013-04-30	2013-01-26	2012-10-27	2012-07-28	2012-04-30	2012-01-28	2011-10-29	2011-07-30	2011-04-30	2011-01-29	2010-10-30	2010-07-31
Value	0	86000.0	7000.0	0	0	93000.0	0	0	4000.0	67000.0	14000.0	527000.0	524000.0	1640000.0	3210000.0	397000.0	0	258000.0	96000.0	482000.0	29000.0	515000.0	7000.0	36000.0	0	679000.0	5826000.0	728000.0	132000.0	23000.0	124000.0	5000.0	91000.0	69000.0	57000.0	185000.0	128000.0	195000.0	293000.0	146000.0	45000.0	135000.0
Percentage of ProceedsFromStockOptionsExercised	0.0	100.0	100.0	0.0	0.0	100.0	0.0	0.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	0.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	0.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:ProvisionForDoubtfulAccounts

Period End	2020-10-31	2020-08-01	2020-04-30	2020-01-25	2019-10-26	2019-07-27	2019-04-30	2019-01-26	2018-10-27	2018-07-28	2018-04-30	2018-01-27	2017-10-28	2017-07-29	2017-04-30	2017-01-28	2016-10-29	2016-07-30	2016-04-30	2016-01-30	2015-10-31	2015-08-01	2015-04-30	2015-01-31	2014-11-01	2014-08-02	2014-04-30	2014-01-25	2013-10-26	2013-07-27	2013-04-30	2013-01-26	2012-10-27	2012-07-28	2012-04-30	2012-01-28	2011-10-29	2011-07-30	2011-04-30	2011-01-29	2010-10-30	2010-07-31
Value	-20000.0	-136000.0	390000.0	-16000.0	3000.0	11000.0	-6000.0	-6000.0	21000.0	-48000.0	-125000.0	159000.0	732000.0	211000.0	-59000.0	-4000.0	-52000.0	171000.0	74000.0	-21000.0	-84000.0	-147000.0	-5000.0	4000.0	36000.0	-141000.0	-275000.0	-40000.0	187000.0	122000.0	124000.0	-228000.0	326000.0	240000.0	-63000.0	108000.0	-84000.0	330000.0	-164000.0	-189000.0	-151000.0	399000.0
Percentage of ProvisionForDoubtfulAccounts	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:ResearchAndDevelopmentArrangementContractToPerformForOthersCompensationEarned

Period End	2020-10-31	2020-08-01	2020-04-30	2020-01-25	2019-10-26	2019-07-27	2019-04-30	2019-01-26	2018-10-27	2018-07-28	2018-04-30	2018-01-27	2017-10-28	2017-07-29	2017-04-30	2017-01-28	2016-10-29	2016-07-30	2016-04-30	2016-01-30	2015-10-31	2015-08-01	2015-04-30	2015-01-31	2014-11-01	2014-08-02	2014-04-30	2014-01-25	2013-10-26	2013-07-27	2013-04-30	2013-01-26	2012-10-27	2012-07-28	2012-04-30	2012-01-28	2011-10-29	2011-07-30
Value	20	23	30	17	17	15	21	19	18	17	21	10	13	6.235	5.23	9.089	14	14	17	8.877	10	16	19	8.0	5.6	4.3	6.493	5.0	6.6	10	9.217	11	10	6.6	12	5.9	4.0	5.2
Percentage of ResearchAndDevelopmentArrangementContractToPerformForOthersCompensationEarned	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:RevenueFromRelatedParties

Period End	2020-10-31	2020-08-01	2020-04-30	2020-01-25	2019-10-26	2019-07-27	2019-04-30	2019-01-26	2018-10-27	2018-07-28	2018-04-30	2018-01-27	2017-10-28
Value	11	16	23	11	13	12	17	13	12	11	14	5.42	7.071
Percentage of RevenueFromRelatedParties	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:RevenueFromRelatedParties us-gaap:RelatedPartyTransaction, us-gaap:RelatedPartyTransactionsByRelatedParty

avav:DesignAndDevelopmentAgreement, avav:Hapsmobile

Period End	2020-10-31	2020-08-01	2020-01-25	2019-10-26	2019-07-27	2019-01-26	2018-10-27
Value	11	16	11	13	12	13	12
Percentage of RevenueFromRelatedParties	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability

Period End	2020-10-31	2020-08-01	2019-10-26	2019-07-27
Value	5.757	5.883	0.38	10
Percentage of RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	100.0	100.0	100.0	100.0

us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage us-gaap:AwardType, us-gaap:PlanName, us-gaap:Vesting

us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage

us-gaap:PerformanceShares, avav:Fiscal2021Ltip, avav:ShareBasedCompensationAwardFiftyPercent

Period End	2020-08-01
Value	50.0
Percentage of SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage	100.0

us-gaap:PerformanceShares, avav:Fiscal2021Ltip, avav:ShareBasedCompensationAwardOneHundredPercent

Period End	2020-08-01
Value	100.0
Percentage of SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage	200.0

us-gaap:PerformanceShares, avav:Fiscal2021Ltip, avav:ShareBasedCompensationAwardTwoHundredFiftyPercent

Period End	2020-08-01
Value	250.0
Percentage of SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage	500.0

us-gaap:SharesPaidForTaxWithholdingForShareBasedCompensation us-gaap:StatementEquityComponents

us-gaap:SharesPaidForTaxWithholdingForShareBasedCompensation

us-gaap:CommonStock

Period End	2020-04-30	2020-01-25	2019-10-26	2019-07-27	2019-04-30	2019-01-26	2018-10-27	2018-07-28
Value	986.0	3943.0	1389.0	11975.0	897.0	845.0	1526.0	11353.0
Percentage of SharesPaidForTaxWithholdingForShareBasedCompensation	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:ShortTermLeaseCost

Period End	2020-10-31	2020-08-01	2019-10-26	2019-07-27
Value	276000.0	110000.0	110000.0	237000.0
Percentage of ShortTermLeaseCost	100.0	100.0	100.0	100.0

us-gaap:StandardProductWarrantyAccrualPayments

Period End	2020-10-31	2020-08-01	2020-04-30	2020-01-25	2019-10-26	2019-07-27	2019-04-30	2019-01-26	2018-10-27	2018-07-28	2018-04-30	2018-01-27	2017-10-28	2017-07-29	2017-04-30	2017-01-28	2016-10-29	2016-07-30	2016-04-30	2016-01-30	2015-10-31	2015-08-01	2015-04-30	2015-01-31	2014-11-01	2014-08-02	2014-04-30	2014-01-25	2013-10-26	2013-07-27	2013-04-30	2013-01-26	2012-10-27	2012-07-28	2012-04-30	2012-01-28	2011-10-29	2011-07-30
Value	215000.0	435000.0	610000.0	289000.0	319000.0	540000.0	195000.0	354000.0	239000.0	275000.0	-138000.0	566000.0	520000.0	793000.0	1293000.0	679000.0	1500000.0	510000.0	504000.0	508000.0	692000.0	907000.0	414000.0	402000.0	341000.0	389000.0	662000.0	317000.0	383000.0	310000.0	315000.0	390000.0	2052000.0	769000.0	1022000.0	482000.0	602000.0	433000.0
Percentage of StandardProductWarrantyAccrualPayments	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:StandardProductWarrantyAccrualPreexistingIncreaseDecrease

Period End	2020-04-30	2020-01-25	2019-10-26	2019-04-30	2019-01-26	2018-10-27	2018-07-28	2017-04-30	2017-01-28	2016-10-29	2016-07-30	2016-04-30	2016-01-30	2015-10-31	2015-08-01
Value	0	0	-189000.0	-28000.0	26000.0	-219000.0	712000.0	223000.0	200000.0	-179000.0	1407000.0	0	0	0	-424000.0
Percentage of StandardProductWarrantyAccrualPreexistingIncreaseDecrease	0.0	0.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	0.0	0.0	0.0	100.0

us-gaap:StockIssuedDuringPeriodSharesEmployeeBenefitPlan us-gaap:AwardType, us-gaap:PlanName

us-gaap:StockIssuedDuringPeriodSharesEmployeeBenefitPlan

us-gaap:PerformanceShares, avav:Fiscal2018Ltip

Period End	2020-07-31
Value	27356.0
Percentage of StockIssuedDuringPeriodSharesEmployeeBenefitPlan	100.0

us-gaap:StockIssuedDuringPeriodSharesRestrictedStockAwardForfeited us-gaap:StatementEquityComponents

us-gaap:StockIssuedDuringPeriodSharesRestrictedStockAwardForfeited

us-gaap:CommonStock

Period End	2020-04-30	2020-01-25	2019-10-26	2019-07-27	2019-04-30	2019-01-26	2018-10-27	2018-07-28
Value	772.0	764.0	6285.0	4720.0	2923.0	445.0	1202.0	13453.0
Percentage of StockIssuedDuringPeriodSharesRestrictedStockAwardForfeited	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:StockIssuedDuringPeriodSharesRestrictedStockAwardGross us-gaap:StatementEquityComponents

us-gaap:StockIssuedDuringPeriodSharesRestrictedStockAwardGross

us-gaap:CommonStock

Period End	2020-04-30	2020-01-25	2019-10-26	2019-07-27	2019-04-30	2019-01-26	2018-10-27	2018-07-28
Value	57099.0	9200.0	7831.0	57861.0	17653.0	5377.0	1034.0	33412.0
Percentage of StockIssuedDuringPeriodSharesRestrictedStockAwardGross	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:StockIssuedDuringPeriodSharesStockOptionsExercised us-gaap:StatementEquityComponents

us-gaap:StockIssuedDuringPeriodSharesStockOptionsExercised

us-gaap:CommonStock

Period End	2020-04-30	2020-01-25	2019-10-26	2019-07-27	2019-04-30	2019-01-26	2018-10-27	2018-07-28
Value	13189.0	0	0	3000.0	0	0	6725.0	6000.0
Percentage of StockIssuedDuringPeriodSharesStockOptionsExercised	100.0	0.0	0.0	100.0	0.0	0.0	100.0	100.0

us-gaap:StockIssuedDuringPeriodValueStockOptionsExercised

Period End	2020-10-31	2020-08-01	2020-04-30	2020-01-25	2019-10-26	2019-07-27	2019-04-30	2019-01-26	2018-10-27	2018-07-28	2018-04-30	2018-01-27	2017-10-28
Value	0	86000.0	7000.0	0	0	93000.0	-1612000.0	175000.0	357000.0	67000.0	1091000.0	1614000.0	376000.0
Percentage of StockIssuedDuringPeriodValueStockOptionsExercised	0.0	100.0	100.0	0.0	0.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:StockIssuedDuringPeriodValueStockOptionsExercised us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital

Period End	2020-10-31	2020-08-01	2020-04-30	2020-01-25	2019-10-26	2019-07-27	2019-04-30	2019-01-26	2018-10-27	2018-07-28
Value	0	86000.0	7000.0	0	0	93000.0	0	0	4000.0	67000.0
Percentage of StockIssuedDuringPeriodValueStockOptionsExercised	0.0	100.0	100.0	0.0	0.0	100.0	-0.0	0.0	1.1	100.0

us-gaap:Parent

Period End	2020-08-01	2020-04-30	2020-01-25	2019-10-26	2019-07-27	2019-04-30	2019-01-26	2018-10-27	2018-07-28
Value	86000.0	7000.0	0	0	93000.0	0	0	4000.0	67000.0
Percentage of StockIssuedDuringPeriodValueStockOptionsExercised	100.0	100.0	0.0	0.0	100.0	-0.0	0.0	1.1	100.0

us-gaap:SubleaseIncome

Period End	2020-10-31	2020-08-01	2019-10-26	2019-07-27
Value	48000.0	38000.0	57000.0	117000.0
Percentage of SubleaseIncome	100.0	100.0	100.0	100.0

us-gaap:VariableLeaseCost

Period End	2020-10-31	2020-08-01	2019-10-26	2019-07-27
Value	2000.0	1000.0	324000.0	89000.0
Percentage of VariableLeaseCost	100.0	100.0	100.0	100.0

avav:BusinessCombinationsIndebtednessPaidOff us-gaap:BusinessAcquisition

avav:BusinessCombinationsIndebtednessPaidOff

avav:TelerobGesellschaftFrFernhantierungstechnikGmbh

Period End	2020-12-03
Value	7800000.0
Percentage of BusinessCombinationsIndebtednessPaidOff	100.0

avav:DeferredTaxAssetsOperatingLossAndTaxCreditCarryForwards

Period End	2020-04-30	2019-04-30	2018-04-30	2017-04-30	2016-04-30	2015-04-30
Value	12	13	12	11	9.554	5.692
Percentage of DeferredTaxAssetsOperatingLossAndTaxCreditCarryForwards	100.0	100.0	100.0	100.0	100.0	100.0

avav:DeferredTaxAssetsOutsideBasisDifference

Period End	2020-04-30	2019-04-30
Value	2264000.0	1150000.0
Percentage of DeferredTaxAssetsOutsideBasisDifference	100.0	100.0

avav:DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAllowancesReservesAndOther

Period End	2020-04-30	2019-04-30	2018-04-30	2017-04-30	2016-04-30	2015-04-30	2014-04-30	2013-04-30	2012-04-30
Value	1784000.0	2729000.0	2100000.0	1801000.0	1330000.0	1543000.0	2547000.0	3050000.0	763000.0
Percentage of DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAllowancesReservesAndOther	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

avav:DeferredTaxLiabilitiesRevenueRecognition

Period End	2020-04-30	2019-04-30	2018-04-30
Value	3112000.0	2909000.0	-326000.0
Percentage of DeferredTaxLiabilitiesRevenueRecognition	100.0	100.0	100.0

avav:MaximumNetValueForTest us-gaap:RelatedPartyTransaction

avav:MaximumNetValueForTest

avav:DesignAndDevelopmentAgreement

Period End	2020-10-31	2020-08-01
Value	173	166
Percentage of MaximumNetValueForTest	100.0	100.0

avav:Retentions

Period End	2020-04-30	2019-04-30	2018-04-30	2017-04-30	2016-04-30	2015-04-30	2014-04-30
Value	717000.0	1102000.0	1411000.0	1537000.0	1453000.0	1344000.0	1074000.0
Percentage of Retentions	100.0	100.0	100.0	100.0	100.0	100.0	100.0

avav:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsNonvestedNumberOfShares us-gaap:AwardType

avav:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsNonvestedNumberOfShares

avav:EmployeeAndNonemployeeStockOptions

Period End	2020-04-30	2019-04-30	2018-04-30	2017-04-30	2016-04-30	2015-04-30
Value	16000.0	39510.0	83014.0	140120.0	292510.0	293910.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsNonvestedNumberOfShares	100.0	100.0	100.0	100.0	100.0	100.0

avav:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsNonvestedWeightedAverageGrantDateFairValue us-gaap:AwardType

avav:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsNonvestedWeightedAverageGrantDateFairValue

avav:EmployeeAndNonemployeeStockOptions

Period End	2020-04-30	2019-04-30	2018-04-30	2017-04-30	2016-04-30	2015-04-30
Value	10.16	10.9	10.97	10.76	10.53	10.43
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsNonvestedWeightedAverageGrantDateFairValue	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:AccruedSalesCommissionCurrent us-gaap:BalanceSheetLocation

us-gaap:AccruedSalesCommissionCurrent

us-gaap:OtherCurrentLiabilities

Period End	2020-04-30	2019-04-30	2018-04-30
Value	2842000.0	1301000.0	1293000.0
Percentage of AccruedSalesCommissionCurrent	100.0	100.0	100.0

us-gaap:AccumulatedOtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentNetOfTax us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentNetOfTax

us-gaap:AccumulatedOtherComprehensiveIncome

Period End	2020-10-31	2020-08-01	2020-04-30	2019-10-26	2019-07-27	2019-04-30	2019-01-26	2018-10-27	2018-07-28	2018-04-30	2018-01-27
Value	75000.0	75000.0	276000.0	179000.0	169000.0	-34000.0	-32000.0	-31000.0	-20000.0	36000.0	62000.0
Percentage of AccumulatedOtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentNetOfTax	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:AccumulatedTranslationAdjustment

Period End	2020-04-30	2019-04-30	2019-01-26	2018-10-27	2018-07-28	2018-04-30	2018-01-27
Value	276000.0	-34000.0	-32000.0	-31000.0	-20000.0	36000.0	62000.0
Percentage of AccumulatedOtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentNetOfTax	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:AllowanceForDoubtfulAccountsReceivableCurrent

Period End	2020-10-31	2020-08-01	2020-04-30	2020-01-25	2019-10-26	2019-07-27	2019-04-30	2019-01-26	2018-10-27	2018-07-28	2018-04-30	2018-01-27	2017-10-28	2017-07-29	2017-04-30	2017-01-28	2016-10-29	2016-07-30	2016-04-30	2016-01-30	2015-10-31	2015-08-01	2015-04-30	2015-01-31	2014-11-01	2014-08-02	2014-04-30	2014-01-25	2013-10-26	2013-07-27	2013-04-30	2013-01-26	2012-10-27	2012-07-28	2012-04-30	2012-01-28	2011-10-29	2011-07-30	2011-04-30
Value	561000.0	1054000.0	1190000.0	1039000.0	1055000.0	1053000.0	1041000.0	1046000.0	1054000.0	1033000.0	1080000.0	1360000.0	1201000.0	469000.0	291000.0	375000.0	380000.0	433000.0	262000.0	191000.0	212000.0	306000.0	606000.0	622000.0	635000.0	626000.0	791000.0	1108000.0	531000.0	731000.0	936000.0	815000.0	1185000.0	1139000.0	921000.0	984000.0	877000.0	969000.0	639000.0
Percentage of AllowanceForDoubtfulAccountsReceivableCurrent	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:AssetsFairValueDisclosure us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency

us-gaap:AssetsFairValueDisclosure

us-gaap:FairValueInputsLevel2, us-gaap:FairValueMeasurementsRecurring

Period End	2020-10-31	2020-08-01	2020-04-30
Value	82	86	58
Percentage of AssetsFairValueDisclosure	100.0	100.0	100.0

us-gaap:AssetsFairValueDisclosure us-gaap:FairValueByMeasurementFrequency

us-gaap:FairValueMeasurementsRecurring

Period End	2020-10-31	2020-08-01	2020-04-30
Value	82	86	58
Percentage of AssetsFairValueDisclosure	100.0	100.0	100.0

us-gaap:AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax

Period End	2020-10-31	2020-08-01	2020-04-30
Value	12000.0	17000.0	70000.0
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	100.0	100.0	100.0

us-gaap:AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax us-gaap:FinancialInstrument

us-gaap:MunicipalBonds

Period End	2020-10-31	2020-08-01	2020-04-30
Value	9000.0	3000.0	29000.0
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	75.0	17.6	41.4

us-gaap:USGovernmentDebtSecurities

Period End	2020-10-31	2020-08-01	2020-04-30
Value	3000.0	14000.0	41000.0
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	25.0	82.4	58.6

us-gaap:AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax

Period End	2020-10-31	2020-08-01	2020-04-30
Value	9000.0	1000.0	7000.0
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	100.0	100.0	100.0

us-gaap:AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax us-gaap:FinancialInstrument

us-gaap:CorporateBondSecurities

Period End	2020-10-31	2020-04-30
Value	4000.0	3000.0
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	44.4	42.9

us-gaap:MunicipalBonds

Period End	2020-10-31
Value	5000.0
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	55.6

us-gaap:USGovernmentDebtSecurities

Period End	2020-08-01	2020-04-30
Value	1000.0	4000.0
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	100.0	57.1

us-gaap:AvailableForSaleDebtSecuritiesAmortizedCostBasis

Period End	2020-10-31	2020-08-01	2020-04-30	2018-04-30	2018-01-27	2017-10-28	2017-07-29	2017-04-30	2017-01-28	2016-10-29	2016-07-30	2016-04-30	2013-01-26	2012-10-27	2012-07-28	2012-04-30
Value	82	86	58	2.25	2.25	2.25	2.25	2.7	2.7	2.7	2.7	3.1	7.1	7.1	7.175	7.35
Percentage of AvailableForSaleDebtSecuritiesAmortizedCostBasis	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:AvailableForSaleDebtSecuritiesAmortizedCostBasis us-gaap:FinancialInstrument

us-gaap:CorporateBondSecurities

Period End	2020-10-31	2020-04-30
Value	9.838	8.495
Percentage of AvailableForSaleDebtSecuritiesAmortizedCostBasis	11.9	14.6

us-gaap:MunicipalBonds

Period End	2020-10-31	2020-08-01	2020-04-30
Value	18	1.345	6.807
Percentage of AvailableForSaleDebtSecuritiesAmortizedCostBasis	22.9	1.6	11.7

us-gaap:USGovernmentDebtSecurities

Period End	2020-10-31	2020-08-01	2020-04-30
Value	54	84	42
Percentage of AvailableForSaleDebtSecuritiesAmortizedCostBasis	65.3	98.4	73.6

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesNextRollingTwelveMonthsAmortizedCostBasis

Period End	2020-10-31	2020-08-01
Value	67	71
Percentage of AvailableForSaleSecuritiesDebtMaturitiesNextRollingTwelveMonthsAmortizedCostBasis	100.0	100.0

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesNextRollingTwelveMonthsFairValue

Period End	2020-10-31	2020-08-01
Value	67	71
Percentage of AvailableForSaleSecuritiesDebtMaturitiesNextRollingTwelveMonthsFairValue	100.0	100.0

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesRollingYearTwoThroughFiveAmortizedCostBasis

Period End	2020-10-31	2020-08-01
Value	15	15
Percentage of AvailableForSaleSecuritiesDebtMaturitiesRollingYearTwoThroughFiveAmortizedCostBasis	100.0	100.0

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesRollingYearTwoThroughFiveFairValue

Period End	2020-10-31	2020-08-01
Value	15	15
Percentage of AvailableForSaleSecuritiesDebtMaturitiesRollingYearTwoThroughFiveFairValue	100.0	100.0

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesSingleMaturityDate

Period End	2020-10-31	2020-08-01
Value	82	86
Percentage of AvailableForSaleSecuritiesDebtMaturitiesSingleMaturityDate	100.0	100.0

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesSingleMaturityDateAmortizedCostBasis

Period End	2020-10-31	2020-08-01
Value	82	86
Percentage of AvailableForSaleSecuritiesDebtMaturitiesSingleMaturityDateAmortizedCostBasis	100.0	100.0

us-gaap:AvailableForSaleSecuritiesDebtSecurities

Period End	2020-10-31	2020-08-01	2020-04-30
Value	82	86	58
Percentage of AvailableForSaleSecuritiesDebtSecurities	100.0	100.0	100.0

us-gaap:AvailableForSaleSecuritiesDebtSecurities us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency

us-gaap:FairValueInputsLevel2, us-gaap:FairValueMeasurementsRecurring

Period End	2020-10-31	2020-08-01	2020-04-30
Value	82	86	58
Percentage of AvailableForSaleSecuritiesDebtSecurities	100.0	100.0	100.0

us-gaap:AvailableForSaleSecuritiesDebtSecurities us-gaap:FairValueByMeasurementFrequency

us-gaap:FairValueMeasurementsRecurring

Period End	2020-10-31	2020-08-01	2020-04-30
Value	82	86	58
Percentage of AvailableForSaleSecuritiesDebtSecurities	100.0	100.0	100.0

us-gaap:AvailableForSaleSecuritiesDebtSecurities us-gaap:FinancialInstrument

us-gaap:CorporateBondSecurities

Period End	2020-10-31	2020-04-30
Value	9.834	8.492
Percentage of AvailableForSaleSecuritiesDebtSecurities	11.9	14.6

us-gaap:MunicipalBonds

Period End	2020-10-31	2020-08-01	2020-04-30
Value	18	1.348	6.836
Percentage of AvailableForSaleSecuritiesDebtSecurities	22.9	1.6	11.8

us-gaap:USGovernmentDebtSecurities

Period End	2020-10-31	2020-08-01	2020-04-30
Value	54	84	42
Percentage of AvailableForSaleSecuritiesDebtSecurities	65.3	98.4	73.6

us-gaap:BusinessAcquisitionPercentageOfVotingInterestsAcquired us-gaap:BusinessAcquisition

us-gaap:BusinessAcquisitionPercentageOfVotingInterestsAcquired

avav:TelerobGesellschaftFrFernhantierungstechnikGmbh

Period End	2020-12-03
Value	100.0
Percentage of BusinessAcquisitionPercentageOfVotingInterestsAcquired	100.0

us-gaap:BusinessCombinationContingentConsiderationLiability

Period End	2020-02-26
Value	2500000.0
Percentage of BusinessCombinationContingentConsiderationLiability	100.0

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations

Period End	2020-04-30	2020-01-25	2019-10-26	2019-07-27	2019-04-30	2019-01-26	2018-10-27	2018-07-28	2018-04-30	2017-04-30	2016-04-30
Value	255	136	135	142	172	149	151	170	143	79	124
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption us-gaap:AdjustmentsForNewAccountingPronouncements

us-gaap:CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption

us-gaap:AccountingStandardsUpdate201409

Period End	2020-04-30	2020-01-25	2019-07-27	2017-04-30
Value	665000.0	665000.0	665000.0	500000.0
Percentage of CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption	100.0	100.0	100.0	100.0

us-gaap:CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption us-gaap:AdjustmentsForNewAccountingPronouncements, us-gaap:StatementEquityComponents

us-gaap:AccountingStandardsUpdate201409, us-gaap:Parent

Period End	2020-04-30	2020-01-25	2019-07-27	2017-04-30
Value	665000.0	665000.0	665000.0	500000.0
Percentage of CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption	100.0	100.0	100.0	100.0

us-gaap:AccountingStandardsUpdate201409, us-gaap:RetainedEarnings

Period End	2020-04-30	2020-01-25	2019-07-27	2017-04-30
Value	665000.0	665000.0	665000.0	500000.0
Percentage of CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption	100.0	100.0	100.0	100.0

us-gaap:DeferredIncomeCurrent

Period End	2020-10-31	2020-08-01	2020-04-30	2020-01-25	2019-10-26	2019-04-30
Value	2.957	5.725	7.899	10	2.55	2.962
Percentage of DeferredIncomeCurrent	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:DeferredIncomeTaxAssetsNet

Period End	2020-10-31	2020-08-01	2020-04-30	2020-01-25	2019-10-26	2019-07-27	2019-04-30
Value	5546000.0	5262000.0	4928000.0	8296000.0	8019000.0	7699000.0	6685000.0
Percentage of DeferredIncomeTaxAssetsNet	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:DeferredIncomeTaxLiabilities

Period End	2020-04-30	2019-04-30	2018-04-30	2017-04-30	2016-04-30	2015-04-30	2014-04-30	2013-04-30	2012-04-30
Value	6295000.0	3334000.0	682000.0	457000.0	395000.0	323000.0	2714000.0	3452000.0	836000.0
Percentage of DeferredIncomeTaxLiabilities	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:DeferredTaxAssetsGoodwillAndIntangibleAssets

Period End	2020-04-30	2019-04-30	2018-04-30	2017-04-30	2016-04-30	2015-04-30	2014-04-30
Value	605000.0	125000.0	94000.0	43000.0	416000.0	464000.0	276000.0
Percentage of DeferredTaxAssetsGoodwillAndIntangibleAssets	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:DeferredTaxAssetsGross

Period End	2020-04-30	2019-04-30	2018-04-30	2017-04-30	2016-04-30	2015-04-30	2014-04-30	2013-04-30
Value	25	21	20	20	19	16	15	12
Percentage of DeferredTaxAssetsGross	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefits

Period End	2020-04-30	2019-04-30	2018-07-28	2017-07-29
Value	2259000.0	1647000.0	1150000.0	1025000.0
Percentage of DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefits	100.0	100.0	100.0	100.0

us-gaap:DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities

Period End	2020-04-30	2019-04-30	2018-04-30	2017-04-30	2016-04-30	2015-04-30	2014-04-30	2013-04-30	2012-04-30
Value	3337000.0	5206000.0	5771000.0	7074000.0	8238000.0	8442000.0	6459000.0	6266000.0	9697000.0
Percentage of DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:DeferredTaxLiabilitiesPropertyPlantAndEquipment

Period End	2020-04-30	2019-04-30	2018-04-30	2017-04-30	2016-04-30	2015-04-30	2013-04-30	2012-04-30
Value	1218000.0	425000.0	682000.0	428000.0	395000.0	86000.0	1641000.0	836000.0
Percentage of DeferredTaxLiabilitiesPropertyPlantAndEquipment	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:DueFromRelatedParties

Period End	2020-10-31	2020-08-01	2020-04-30	2020-01-25	2019-10-26	2019-07-27	2019-04-30	2019-01-26	2018-10-27	2018-07-28	2018-04-30
Value	14	28	15	28	21	12	9.028	13	7.764	9.504	3.145
Percentage of DueFromRelatedParties	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:DueFromRelatedParties us-gaap:RelatedPartyTransaction, us-gaap:RelatedPartyTransactionsByRelatedParty

avav:DesignAndDevelopmentAgreement, avav:Hapsmobile

Period End	2020-10-31	2020-08-01	2020-04-30	2020-01-25	2019-10-26	2019-04-30
Value	14	28	15	28	21	9.028
Percentage of DueFromRelatedParties	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:DueFromRelatedParties us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:BalanceSheetLocation

avav:Hapsmobile, avav:UnbilledReceivablesAndRetentions

Period End	2020-04-30	2019-04-30	2018-04-30
Value	15	9.028	3.145
Percentage of DueFromRelatedParties	100.0	100.0	100.0

us-gaap:EmployeeRelatedLiabilitiesCurrent

Period End	2020-10-31	2020-08-01	2020-04-30	2020-01-25	2019-10-26	2019-07-27	2019-04-30	2019-01-26	2018-10-27	2018-07-28	2018-04-30	2018-01-27	2017-10-28	2017-07-29	2017-04-30	2017-01-28	2016-10-29	2016-07-30	2016-04-30	2016-01-30	2015-10-31	2015-08-01	2015-04-30	2015-01-31	2014-11-01	2014-08-02	2014-04-30	2014-01-25	2013-10-26	2013-07-27	2013-04-30	2013-01-26	2012-10-27	2012-07-28	2012-04-30	2012-01-28	2011-10-29	2011-07-30	2011-04-30
Value	18	13	23	17	13	12	18	14	11	10	16	15	10	10	12	10	10	9.934	13	13	10	10	13	12	9.889	9.282	14	10	11	9.109	12	9.652	13	10	19	13	12	9.024	15
Percentage of EmployeeRelatedLiabilitiesCurrent	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:EquityMethodInvestmentOwnershipPercentage us-gaap:CounterpartyName

us-gaap:EquityMethodInvestmentOwnershipPercentage

avav:Softbank

Period End	2020-04-30	2017-12-31	2017-12-27
Value	0.93	0.95	0.95
Percentage of EquityMethodInvestmentOwnershipPercentage	100.0	100.0	100.0

us-gaap:EquityMethodInvestmentOwnershipPercentage us-gaap:CounterpartyName, us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

avav:Softbank, avav:Hapsmobile

Period End	2020-10-31	2020-08-01	2020-01-25	2019-10-26	2019-07-27	2017-12-27
Value	93.0	93.0	0.93	0.95	0.95	0.95
Percentage of EquityMethodInvestmentOwnershipPercentage	0.0	0.0	0.0	0.0	0.0	100.0

us-gaap:EquityMethodInvestmentOwnershipPercentage us-gaap:Ownership, us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

avav:Aerovironment, avav:Hapsmobile

Period End	2020-10-31	2020-08-01	2020-01-25	2019-10-26	2019-07-27	2017-12-27
Value	7.0	7.0	0.07	0.05	0.05	0.05
Percentage of EquityMethodInvestmentOwnershipPercentage	0.0	0.0	0.0	0.0	0.0	5.3

us-gaap:EquityMethodInvestmentOwnershipPercentage us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

avav:Hapsmobile

Period End	2020-04-30	2019-12-04	2019-10-26	2019-07-27	2019-05-11	2019-05-10	2019-04-30	2019-02-09	2019-02-08	2019-01-29	2018-04-30	2017-12-31	2017-12-27
Value	0.05	0.07	0.05	0.05	0.05	0.1	0.1	0.1	0.05	0.05	0.05	0.05	0.05
Percentage of EquityMethodInvestmentOwnershipPercentage	5.4	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	5.3	5.3

us-gaap:EquityMethodInvestmentSummarizedFinancialInformationCurrentAssets us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

us-gaap:EquityMethodInvestmentSummarizedFinancialInformationCurrentAssets

avav:LimitedPartnershipFund

Period End	2020-04-30	2019-04-30
Value	67	31
Percentage of EquityMethodInvestmentSummarizedFinancialInformationCurrentAssets	100.0	100.0

us-gaap:EquityMethodInvestmentSummarizedFinancialInformationCurrentLiabilities us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

us-gaap:EquityMethodInvestmentSummarizedFinancialInformationCurrentLiabilities

avav:LimitedPartnershipFund

Period End	2020-04-30	2019-04-30
Value	72	11
Percentage of EquityMethodInvestmentSummarizedFinancialInformationCurrentLiabilities	100.0	100.0

us-gaap:EquityMethodInvestments

Period End	2020-10-31	2020-08-01	2020-04-30
Value	5.335	5.334	4.442
Percentage of EquityMethodInvestments	100.0	100.0	100.0

us-gaap:EquityMethodInvestments us-gaap:FinancialInstrument

avav:InvestmentInLimitedPartnershipFund

Period End	2020-10-31	2020-08-01	2020-04-30
Value	5.335	5.334	4.442
Percentage of EquityMethodInvestments	100.0	100.0	100.0

us-gaap:EquityMethodInvestments us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:BalanceSheetLocation

avav:Hapsmobile, us-gaap:OtherNoncurrentAssets

Period End	2020-10-31	2020-08-01	2020-04-30	2020-01-25	2019-10-26	2019-07-27	2019-04-30	2018-04-30
Value	0.0	9.522	10	11	8.149	9.002	5.612	2.02
Percentage of EquityMethodInvestments	0.0	178.5	235.4	0.0	0.0	0.0	0.0	0.0

us-gaap:EscrowDeposit us-gaap:BusinessAcquisition

us-gaap:EscrowDeposit

avav:TelerobGesellschaftFrFernhantierungstechnikGmbh

Period End	2020-12-03
Value	3000000.0
Percentage of EscrowDeposit	100.0

us-gaap:FiniteLivedIntangibleAssetsAccumulatedAmortization

Period End	2020-10-31	2020-08-01	2020-04-30	2020-01-25	2019-10-26	2019-07-27	2019-04-30	2019-01-26	2018-10-27	2018-07-28	2018-04-30	2018-01-27	2017-10-28	2017-07-29	2017-04-30
Value	5557000.0	4842000.0	4133000.0	3413000.0	2638000.0	1863000.0	1311000.0	1208000.0	1104000.0	1023000.0	954000.0	853000.0	816000.0	737000.0	658000.0
Percentage of FiniteLivedIntangibleAssetsAccumulatedAmortization	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:FiniteLivedIntangibleAssetsAccumulatedAmortization us-gaap:IncomeStatementLocation

us-gaap:OtherNoncurrentAssets

Period End	2020-04-30	2019-04-30	2018-04-30	2017-04-30
Value	4133000.0	1311000.0	954000.0	658000.0
Percentage of FiniteLivedIntangibleAssetsAccumulatedAmortization	100.0	100.0	100.0	100.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths

Period End	2020-04-30
Value	1380000.0
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths	100.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear

Period End	2020-04-30
Value	2079000.0
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear	100.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFive

Period End	2020-04-30
Value	2492000.0
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseYearFive	100.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearFour

Period End	2020-04-30
Value	2629000.0
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseYearFour	100.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearThree

Period End	2020-04-30
Value	2688000.0
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseYearThree	100.0

us-gaap:FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo

Period End	2020-04-30
Value	2829000.0
Percentage of FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo	100.0

us-gaap:FiniteLivedIntangibleAssetsGross

Period End	2020-10-31	2020-08-01	2020-04-30	2020-01-25	2019-10-26	2019-07-27	2019-04-30	2019-01-26	2018-10-27	2018-07-28	2018-04-30	2018-01-27	2017-10-28	2017-04-30
Value	17	17	17	17	18	18	1.77	1.77	1.77	1.582	1.582	1.582	1.582	2.481
Percentage of FiniteLivedIntangibleAssetsGross	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:FiniteLivedIntangibleAssetsGross us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:CustomerRelationships

Period End	2020-10-31	2020-08-01	2020-04-30	2020-01-25	2019-10-26	2019-07-27	2019-04-30	2019-01-26	2018-10-27	2018-07-28	2018-04-30	2018-01-27	2017-10-28	2017-07-29	2017-04-30
Value	0.873	0.873	0.873	0.873	0.873	0.873	0.733	0.733	0.733	0.733	0.733	0.733	0.733	1.6	1.6
Percentage of FiniteLivedIntangibleAssetsGross	4.9	4.9	4.9	4.9	4.7	4.7	41.4	41.4	41.4	46.3	46.3	46.3	46.3	0.0	64.5

us-gaap:InProcessResearchAndDevelopment

Period End	2020-10-31	2020-08-01	2020-04-30	2020-01-25	2019-10-26	2019-07-27
Value	0.55	0.55	0.55	0.55	1.37	1.37
Percentage of FiniteLivedIntangibleAssetsGross	3.1	3.1	3.1	3.1	7.4	7.4

us-gaap:LicensingAgreements

Period End	2020-10-31	2020-08-01	2020-04-30	2020-01-25	2019-10-26	2019-07-27	2019-04-30	2019-01-26	2018-10-27	2018-07-28	2018-04-30	2018-01-27	2017-10-28	2017-07-29	2017-04-30	2016-04-30	2015-04-30	2014-04-30	2013-04-30
Value	1.006	1.006	1.006	1.006	1.006	1.006	1.006	1.006	1.006	0.818	0.818	0.818	0.818	0.818	0.818	0.818	0.818	0.856	0.85
Percentage of FiniteLivedIntangibleAssetsGross	5.7	5.7	5.7	5.7	5.4	5.4	56.8	56.8	56.8	51.7	51.7	51.7	51.7	0.0	33.0	0.0	0.0	0.0	0.0

us-gaap:TrademarksAndTradeNames

Period End	2020-10-31	2020-08-01	2020-04-30	2020-01-25	2019-10-26	2019-07-27	2019-04-30	2019-01-26	2018-10-27	2018-07-28	2018-04-30	2018-01-27	2017-10-28	2017-07-29	2017-04-30
Value	0.068	0.068	0.068	0.068	0.068	0.068	0.028	0.028	0.028	0.028	0.028	0.028	0.028	0.06	0.06
Percentage of FiniteLivedIntangibleAssetsGross	0.4	0.4	0.4	0.4	0.4	0.4	1.6	1.6	1.6	1.8	1.8	1.8	1.8	0.0	2.4

us-gaap:FiniteLivedIntangibleAssetsGross us-gaap:FiniteLivedIntangibleAssetsByMajorClass, us-gaap:IncomeStatementLocation

us-gaap:CustomerRelationships, us-gaap:OtherNoncurrentAssets

Period End	2020-04-30	2019-04-30	2018-04-30	2017-04-30
Value	0.873	0.733	0.733	1.6
Percentage of FiniteLivedIntangibleAssetsGross	4.9	41.4	46.3	64.5

us-gaap:InProcessResearchAndDevelopment, us-gaap:OtherNoncurrentAssets

Period End	2020-04-30
Value	0.55
Percentage of FiniteLivedIntangibleAssetsGross	3.1

us-gaap:LicensingAgreements, us-gaap:OtherNoncurrentAssets

Period End	2020-04-30	2019-04-30	2018-04-30	2017-04-30	2016-04-30
Value	1.006	1.006	0.818	0.818	0.818
Percentage of FiniteLivedIntangibleAssetsGross	5.7	56.8	51.7	33.0	0.0

us-gaap:NoncompeteAgreements, us-gaap:OtherNoncurrentAssets

Period End	2020-04-30
Value	0.32
Percentage of FiniteLivedIntangibleAssetsGross	1.8

us-gaap:TechnologyBasedIntangibleAssets, us-gaap:OtherNoncurrentAssets

Period End	2020-04-30
Value	14
Percentage of FiniteLivedIntangibleAssetsGross	84.1

us-gaap:TrademarksAndTradeNames, us-gaap:OtherNoncurrentAssets

Period End	2020-04-30	2019-04-30	2018-04-30	2017-04-30
Value	0.068	0.028	0.028	0.06
Percentage of FiniteLivedIntangibleAssetsGross	0.4	1.6	1.8	2.4

us-gaap:FiniteLivedIntangibleAssetsGross us-gaap:IncomeStatementLocation

us-gaap:OtherNoncurrentAssets

Period End	2020-04-30	2019-04-30	2018-04-30	2017-04-30
Value	17	1.77	1.582	2.481
Percentage of FiniteLivedIntangibleAssetsGross	100.0	100.0	100.0	100.0

us-gaap:HeldToMaturitySecurities

Period End	2020-04-30	2020-01-25	2019-10-26	2019-07-27	2019-04-30	2019-01-26	2018-10-27	2018-07-28	2018-04-30	2018-01-27	2017-10-28	2017-07-29	2017-04-30	2017-01-28	2016-10-29	2016-07-30	2016-04-30	2016-01-30	2015-10-31	2015-08-01	2015-04-30	2015-01-31	2014-11-01	2014-08-02	2014-04-30	2014-01-25	2013-10-26	2013-07-27	2013-04-30	2013-01-26	2012-10-27	2012-07-28	2012-04-30
Value	58	156	170	165	159	172	168	155	152	146	141	141	159	162	158	132	134	133	112	112	127	126	123	107	104	107	120	120	127	124	123	120	129
Percentage of HeldToMaturitySecurities	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:HeldToMaturitySecurities us-gaap:FinancialInstrument, us-gaap:InvestmentType

us-gaap:CorporateBondSecurities, us-gaap:AvailableforsaleSecurities

Period End	2020-04-30
Value	8.495
Percentage of HeldToMaturitySecurities	14.6

us-gaap:CorporateBondSecurities, us-gaap:HeldtomaturitySecurities

Period End	2020-04-30
Value	83
Percentage of HeldToMaturitySecurities	144.6

us-gaap:MunicipalBonds, us-gaap:AvailableforsaleSecurities

Period End	2020-04-30
Value	6.807
Percentage of HeldToMaturitySecurities	11.7

us-gaap:MunicipalBonds, us-gaap:HeldtomaturitySecurities

Period End	2020-04-30
Value	5.332
Percentage of HeldToMaturitySecurities	9.2

us-gaap:USGovernmentDebtSecurities, us-gaap:AvailableforsaleSecurities

Period End	2020-04-30
Value	42
Percentage of HeldToMaturitySecurities	73.6

us-gaap:USGovernmentDebtSecurities, us-gaap:HeldtomaturitySecurities

Period End	2020-04-30
Value	70
Percentage of HeldToMaturitySecurities	121.7

us-gaap:HeldToMaturitySecurities us-gaap:InvestmentType

us-gaap:AvailableforsaleSecurities

Period End	2020-04-30
Value	58
Percentage of HeldToMaturitySecurities	100.0

us-gaap:HeldtomaturitySecurities

Period End	2020-04-30
Value	159
Percentage of HeldToMaturitySecurities	275.5

us-gaap:HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingGain us-gaap:FinancialInstrument, us-gaap:InvestmentType

us-gaap:HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingGain

us-gaap:CorporateBondSecurities, us-gaap:HeldtomaturitySecurities

Period End	2020-04-30
Value	20000.0
Percentage of HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingGain	100.0

us-gaap:MunicipalBonds, us-gaap:AvailableforsaleSecurities

Period End	2020-04-30
Value	29000.0
Percentage of HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingGain	145.0

us-gaap:MunicipalBonds, us-gaap:HeldtomaturitySecurities

Period End	2020-04-30
Value	2000.0
Percentage of HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingGain	10.0

us-gaap:USGovernmentDebtSecurities, us-gaap:AvailableforsaleSecurities

Period End	2020-04-30
Value	41000.0
Percentage of HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingGain	205.0

us-gaap:USGovernmentDebtSecurities, us-gaap:HeldtomaturitySecurities

Period End	2020-04-30
Value	78000.0
Percentage of HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingGain	390.0

us-gaap:HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingGain us-gaap:InvestmentType

us-gaap:AvailableforsaleSecurities

Period End	2020-04-30
Value	70000.0
Percentage of HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingGain	350.0

us-gaap:HeldtomaturitySecurities

Period End	2020-04-30
Value	100000.0
Percentage of HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingGain	500.0

us-gaap:HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingLoss us-gaap:FinancialInstrument, us-gaap:InvestmentType

us-gaap:HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingLoss

us-gaap:CorporateBondSecurities, us-gaap:AvailableforsaleSecurities

Period End	2020-04-30
Value	3000.0
Percentage of HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingLoss	100.0

us-gaap:CorporateBondSecurities, us-gaap:HeldtomaturitySecurities

Period End	2020-04-30
Value	5000.0
Percentage of HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingLoss	166.7

us-gaap:MunicipalBonds, us-gaap:HeldtomaturitySecurities

Period End	2020-04-30
Value	1000.0
Percentage of HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingLoss	33.3

us-gaap:USGovernmentDebtSecurities, us-gaap:AvailableforsaleSecurities

Period End	2020-04-30
Value	4000.0
Percentage of HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingLoss	133.3

us-gaap:USGovernmentDebtSecurities, us-gaap:HeldtomaturitySecurities

Period End	2020-04-30
Value	52000.0
Percentage of HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingLoss	1733.3

us-gaap:HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingLoss us-gaap:InvestmentType

us-gaap:AvailableforsaleSecurities

Period End	2020-04-30
Value	7000.0
Percentage of HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingLoss	233.3

us-gaap:HeldtomaturitySecurities

Period End	2020-04-30
Value	58000.0
Percentage of HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingLoss	1933.3

us-gaap:HeldToMaturitySecuritiesFairValue

Period End	2020-04-30	2020-01-25	2019-10-26	2019-07-27	2019-04-30	2019-01-26	2018-10-27	2018-07-28	2018-04-30	2018-01-27	2017-10-28	2017-07-29	2017-04-30	2017-01-28	2016-10-29	2016-07-30	2016-04-30	2016-01-30	2015-10-31	2015-08-01	2015-04-30	2015-01-31	2014-11-01	2014-08-02	2014-04-30	2014-01-25	2013-10-26	2013-07-27	2013-04-30	2013-01-26	2012-10-27	2012-07-28	2012-04-30
Value	58	156	170	165	159	172	168	154	151	145	141	141	159	162	158	132	134	133	112	112	127	126	123	107	104	107	120	121	127	124	123	120	129
Percentage of HeldToMaturitySecuritiesFairValue	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:HeldToMaturitySecuritiesFairValue us-gaap:FinancialInstrument, us-gaap:InvestmentType

us-gaap:CorporateBondSecurities, us-gaap:AvailableforsaleSecurities

Period End	2020-04-30
Value	8.492
Percentage of HeldToMaturitySecuritiesFairValue	14.6

us-gaap:CorporateBondSecurities, us-gaap:HeldtomaturitySecurities

Period End	2020-04-30
Value	83
Percentage of HeldToMaturitySecuritiesFairValue	144.5

us-gaap:MunicipalBonds, us-gaap:AvailableforsaleSecurities

Period End	2020-04-30
Value	6.836
Percentage of HeldToMaturitySecuritiesFairValue	11.8

us-gaap:MunicipalBonds, us-gaap:HeldtomaturitySecurities

Period End	2020-04-30
Value	5.333
Percentage of HeldToMaturitySecuritiesFairValue	9.2

us-gaap:USGovernmentDebtSecurities, us-gaap:AvailableforsaleSecurities

Period End	2020-04-30
Value	42
Percentage of HeldToMaturitySecuritiesFairValue	73.6

us-gaap:USGovernmentDebtSecurities, us-gaap:HeldtomaturitySecurities

Period End	2020-04-30
Value	70
Percentage of HeldToMaturitySecuritiesFairValue	121.6

us-gaap:HeldToMaturitySecuritiesFairValue us-gaap:InvestmentType

us-gaap:AvailableforsaleSecurities

Period End	2020-04-30	2019-04-30
Value	58	0.0
Percentage of HeldToMaturitySecuritiesFairValue	100.0	0.0

us-gaap:HeldtomaturitySecurities

Period End	2020-04-30
Value	159
Percentage of HeldToMaturitySecuritiesFairValue	275.3

us-gaap:InventoryGross

Period End	2020-10-31	2020-08-01	2020-04-30	2020-01-25	2019-10-26	2019-07-27	2019-04-30	2019-01-26	2018-10-27	2018-07-28	2018-04-30	2018-01-27	2017-10-28	2017-07-29	2017-04-30	2017-01-28	2016-10-29	2016-07-30	2016-04-30	2016-01-30	2015-10-31	2015-08-01	2015-04-30	2015-01-31	2014-11-01	2014-08-02	2014-04-30	2014-01-25	2013-10-26	2013-07-27	2013-04-30	2013-01-26	2012-10-27	2012-07-28	2012-04-30
Value	60	54	55	75	63	64	61	56	50	46	42	83	81	77	65	73	59	48	41	50	52	47	44	52	54	49	53	60	63	72	66	67	48	47	46
Percentage of InventoryGross	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:InventoryRawMaterials

Period End	2020-10-31	2020-08-01	2020-04-30	2020-01-25	2019-10-26	2019-07-27	2019-04-30	2019-01-26	2018-10-27	2018-07-28	2018-04-30	2018-01-27	2017-10-28	2017-07-29	2017-04-30	2017-01-28	2016-10-29	2016-07-30	2016-04-30	2016-01-30	2015-10-31	2015-08-01	2015-04-30	2015-01-31	2014-11-01	2014-08-02	2014-04-30	2014-01-25	2013-10-26	2013-07-27	2013-04-30	2013-01-26	2012-10-27	2012-07-28	2012-04-30
Value	21	15	15	19	16	16	16	16	14	14	12	21	21	19	18	17	12	12	11	13	14	14	13	15	14	14	15	15	14	16	12	16	14	14	13
Percentage of InventoryRawMaterials	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:InventoryValuationReserves

Period End	2020-10-31	2020-08-01	2020-04-30	2020-01-25	2019-10-26	2019-07-27	2019-04-30	2019-01-26	2018-10-27	2018-07-28	2018-04-30	2018-01-27	2017-10-28	2017-07-29	2017-04-30	2017-01-28	2016-10-29	2016-07-30	2016-04-30	2016-01-30	2015-10-31	2015-08-01	2015-04-30	2015-01-31	2014-11-01	2014-08-02	2014-04-30	2014-01-25	2013-10-26	2013-07-27	2013-04-30	2013-01-26	2012-10-27	2012-07-28	2012-04-30
Value	8.597	9.204	10	10	10	8.129	7.824	6.544	4.727	4.072	3.953	5.755	5.469	5.968	5.25	4.719	3.922	4.023	4.455	3.69	3.836	3.417	4.588	3.679	3.069	3.222	3.234	4.835	3.159	3.805	3.871	3.564	3.44	2.895	2.754
Percentage of InventoryValuationReserves	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:InventoryWorkInProcess

Period End	2020-10-31	2020-08-01	2020-04-30	2020-01-25	2019-10-26	2019-07-27	2019-04-30	2019-01-26	2018-10-27	2018-07-28	2018-04-30	2018-01-27	2017-10-28	2017-07-29	2017-04-30	2017-01-28	2016-10-29	2016-07-30	2016-04-30	2016-01-30	2015-10-31	2015-08-01	2015-04-30	2015-01-31	2014-11-01	2014-08-02	2014-04-30	2014-01-25	2013-10-26	2013-07-27	2013-04-30	2013-01-26	2012-10-27	2012-07-28	2012-04-30
Value	10	12	10	33	24	20	19	15	12	15	15	29	22	17	16	25	15	7.038	4.259	7.278	8.257	6.55	5.14	5.796	5.604	5.801	7.542	7.961	11	15	16	18	5.83	7.417	7.39
Percentage of InventoryWorkInProcess	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths

Period End	2020-10-31
Value	2234000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	100.0

us-gaap:LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear

Period End	2020-08-01
Value	3576000.0
Percentage of LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear	100.0

us-gaap:LettersOfCreditOutstandingAmount

Period End	2020-04-30	2019-04-30	2018-04-30	2017-04-30	2016-04-30	2015-04-30	2014-04-30
Value	2716000.0	7079000.0	6389000.0	2070000.0	1080000.0	1755000.0	294000.0
Percentage of LettersOfCreditOutstandingAmount	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:LiabilityForUncertainTaxPositionsNoncurrent

Period End	2020-10-31	2020-08-01	2020-04-30	2020-01-25	2019-10-26	2019-07-27	2019-04-30	2019-01-26	2018-10-27	2018-07-28	2018-04-30	2018-01-27	2017-10-28	2017-07-29	2017-04-30	2017-01-28	2016-10-29	2016-07-30	2016-04-30	2016-01-30	2015-10-31	2015-08-01	2015-04-30	2015-01-31	2014-11-01	2014-08-02	2014-04-30	2014-01-25	2013-10-26	2013-07-27	2013-04-30	2013-01-26	2012-10-27	2012-07-28	2012-04-30	2012-01-28	2011-10-29	2011-07-30	2011-04-30
Value	1017000.0	1017000.0	1017000.0	51000.0	51000.0	51000.0	51000.0	49000.0	49000.0	49000.0	49000.0	64000.0	64000.0	64000.0	64000.0	62000.0	62000.0	62000.0	441000.0	439000.0	439000.0	439000.0	439000.0	645000.0	3513000.0	3513000.0	3513000.0	5211000.0	5211000.0	5211000.0	5321000.0	4026000.0	4026000.0	4026000.0	4026000.0	3656000.0	4138000.0	4138000.0	4138000.0
Percentage of LiabilityForUncertainTaxPositionsNoncurrent	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:OperatingLeaseWeightedAverageDiscountRatePercent

Period End	2020-10-31	2020-08-01	2019-10-26	2019-07-27
Value	3.4	3.4	3.7	3.7
Percentage of OperatingLeaseWeightedAverageDiscountRatePercent	100.0	100.0	100.0	100.0

us-gaap:RevenueRemainingPerformanceObligation

Period End	2020-10-31	2020-08-01
Value	130	154
Percentage of RevenueRemainingPerformanceObligation	100.0	100.0

us-gaap:RevenueRemainingPerformanceObligationPercentage

Period End	2020-10-31	2020-08-01	2020-04-30	2020-01-25	2019-10-26	2019-07-27	2019-04-30	2019-01-26	2018-10-27
Value	92.0	95.0	0.96	0.75	0.86	0.91	0.92	0.56	0.77
Percentage of RevenueRemainingPerformanceObligationPercentage	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:SelfInsuranceReserveCurrent

Period End	2020-04-30	2019-04-30	2018-04-30	2017-04-30	2016-04-30	2015-04-30	2014-04-30	2013-04-30	2012-04-30
Value	753000.0	965000.0	1003000.0	1329000.0	1176000.0	1293000.0	1281000.0	1543000.0	1448000.0
Percentage of SelfInsuranceReserveCurrent	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber

us-gaap:RestrictedStock

Period End	2020-04-30	2019-04-30	2018-04-30	2017-04-30	2016-04-30	2015-04-30	2014-04-30	2013-04-30	2012-04-30
Value	201	226	332	0.363258	0.427064	0.397026	0.392913	0.383237	0.326787
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue

us-gaap:RestrictedStock

Period End	2020-04-30	2019-04-30	2018-04-30	2017-04-30	2016-04-30	2015-04-30	2014-04-30	2013-04-30	2012-04-30
Value	55.84	43.35	31.2	26.3	25.99	26.2	23.02	23.32	26.84
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber us-gaap:AwardType, us-gaap:PlanName

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber

avav:EmployeeAndNonemployeeStockOptions, avav:AmendedAndRestated2006EquityIncentivePlan

Period End	2020-04-30	2019-04-30	2018-04-30	2017-04-30	2016-04-30	2015-04-30	2014-04-30
Value	318030.0	297520.0	256010.0	311510.0	391290.0	363210.0	301910.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber	100.0	100.0	100.0	100.0	100.0	100.0	100.0

avav:EmployeeAndNonemployeeStockOptions, avav:NonqualifiedStockOptionPlan1992

Period End	2020-04-30	2019-04-30	2018-04-30	2017-04-30	2016-04-30	2015-04-30	2014-04-30
Value	1113.0	14302.0	18302.0	65640.0	92859.0	103580.0	105080.0
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber	0.3	4.8	7.1	21.1	23.7	28.5	34.8

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice us-gaap:AwardType, us-gaap:PlanName

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice

avav:EmployeeAndNonemployeeStockOptions, avav:AmendedAndRestated2006EquityIncentivePlan

Period End	2020-04-30	2019-04-30	2018-04-30	2017-04-30	2016-04-30	2015-04-30	2014-04-30
Value	25.12	24.94	24.81	24.52	23.48	23.15	23.1
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue us-gaap:AwardType

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue

avav:EmployeeAndNonemployeeStockOptions

Period End	2020-04-30	2019-04-30	2018-04-30	2017-04-30	2016-04-30	2015-04-30	2014-04-30	2013-04-30
Value	11	15	10	3.656	6.06	5.349	12	6.369
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfExercisableOptions

Period End	2020-04-30	2019-04-30	2018-04-30	2017-04-30	2016-04-30	2015-04-30	2014-04-30	2013-04-30
Value	319140.0	311820.0	274310.0	377150.0	497970.0	511780.0	455500.0	816270.0
Percentage of ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfExercisableOptions	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfExercisableOptions us-gaap:ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRange

avav:ExercisePriceRangeFive

Period End	2020-04-30	2019-04-30	2018-04-30	2017-04-30	2015-04-30	2014-04-30	2013-04-30
Value	50000.0	87016.0	81512.0	46506.0	25335.0	59400.0	41335.0
Percentage of ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfExercisableOptions	15.7	27.9	29.7	12.3	5.0	13.0	5.1

avav:ExercisePriceRangeFour

Period End	2020-04-30	2019-04-30	2018-04-30	2017-04-30	2016-04-30	2015-04-30	2014-04-30	2013-04-30
Value	50000.0	50000.0	40000.0	80000.0	102780.0	19658.0	242510.0	82766.0
Percentage of ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfExercisableOptions	15.7	16.0	14.6	21.2	20.6	3.8	53.2	10.1

avav:ExercisePriceRangeOne

Period End	2020-04-30	2019-04-30	2018-04-30	2017-04-30	2016-04-30	2014-04-30	2013-04-30
Value	55113.0	68302.0	72302.0	108040.0	92859.0	105080.0	57415.0
Percentage of ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfExercisableOptions	17.3	21.9	26.4	28.6	18.6	23.1	7.0

avav:ExercisePriceRangeSix

Period End	2020-04-30	2015-04-30	2013-04-30
Value	41526.0	277610.0	373710.0
Percentage of ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfExercisableOptions	13.0	54.2	45.8

avav:ExercisePriceRangeThree

Period End	2020-04-30	2019-04-30	2018-04-30	2017-04-30	2016-04-30	2014-04-30	2013-04-30
Value	64000.0	48000.0	32000.0	68600.0	288510.0	25335.0	53288.0
Percentage of ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfExercisableOptions	20.1	15.4	11.7	18.2	57.9	5.6	6.5

avav:ExercisePriceRangeTwo

Period End	2020-04-30	2019-04-30	2018-04-30	2017-04-30	2016-04-30	2015-04-30	2014-04-30	2013-04-30
Value	58500.0	58500.0	48500.0	74000.0	13824.0	103580.0	23176.0	124150.0
Percentage of ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfExercisableOptions	18.3	18.8	17.7	19.6	2.8	20.2	5.1	15.2

us-gaap:ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfOutstandingOptions

Period End	2020-04-30	2019-04-30	2018-04-30	2017-04-30	2016-04-30	2015-04-30	2014-04-30	2013-04-30
Value	335140.0	351330.0	357330.0	517260.0	790480.0	805690.0	866700.0	1251200.0
Percentage of ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfOutstandingOptions	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfOutstandingOptions us-gaap:ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRange

avav:ExercisePriceRangeFive

Period End	2020-04-30	2019-04-30	2018-04-30	2017-04-30	2015-04-30	2014-04-30	2013-04-30
Value	50000.0	94526.0	96526.0	69024.0	25335.0	229400.0	41335.0
Percentage of ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfOutstandingOptions	14.9	26.9	27.0	13.3	3.1	26.5	3.3

avav:ExercisePriceRangeFour

Period End	2020-04-30	2019-04-30	2018-04-30	2017-04-30	2016-04-30	2015-04-30	2014-04-30	2013-04-30
Value	50000.0	50000.0	50000.0	100000.0	319890.0	19658.0	483710.0	82766.0
Percentage of ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfOutstandingOptions	14.9	14.2	14.0	19.3	40.5	2.4	55.8	6.6

avav:ExercisePriceRangeOne

Period End	2020-04-30	2019-04-30	2018-04-30	2017-04-30	2016-04-30	2014-04-30	2013-04-30
Value	55113.0	68302.0	72302.0	115640.0	92859.0	105080.0	57415.0
Percentage of ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfOutstandingOptions	16.4	19.4	20.2	22.4	11.7	12.1	4.6

avav:ExercisePriceRangeSix

Period End	2020-04-30	2015-04-30	2013-04-30
Value	41526.0	413710.0	620210.0
Percentage of ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfOutstandingOptions	12.4	51.3	49.6

avav:ExercisePriceRangeThree

Period End	2020-04-30	2019-04-30	2018-04-30	2017-04-30	2016-04-30	2014-04-30	2013-04-30
Value	80000.0	80000.0	80000.0	134600.0	363910.0	25335.0	53288.0
Percentage of ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfOutstandingOptions	23.9	22.8	22.4	26.0	46.0	2.9	4.3

avav:ExercisePriceRangeTwo

Period End	2020-04-30	2019-04-30	2018-04-30	2017-04-30	2016-04-30	2015-04-30	2014-04-30	2013-04-30
Value	58500.0	58500.0	58500.0	98000.0	13824.0	103580.0	23176.0	124150.0
Percentage of ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfOutstandingOptions	17.5	16.7	16.4	18.9	1.7	12.9	2.7	9.9

us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1 us-gaap:AwardType

us-gaap:SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1

avav:EmployeeAndNonemployeeStockOptions

Period End	2020-04-30	2019-04-30	2018-04-30	2017-04-30	2016-04-30	2015-04-30	2014-04-30	2013-04-30
Value	11	13	8.587	3.208	5.047	4.56	7.998	6.149
Percentage of SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePrice1

Period End	2020-04-30	2019-04-30	2018-04-30	2017-04-30	2016-04-30	2015-04-30	2014-04-30	2013-04-30
Value	25.03	23.82	23.2	20.36	18.89	17.22	16.21	14.27
Percentage of SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePrice1	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePrice1 us-gaap:ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRange

avav:ExercisePriceRangeFive

Period End	2020-04-30	2019-04-30	2018-04-30	2017-04-30	2015-04-30	2014-04-30	2013-04-30
Value	28.72	29.73	29.65	30.78	11.79	29.13	11.79
Percentage of SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePrice1	114.7	124.8	127.8	151.2	68.5	179.7	82.6

avav:ExercisePriceRangeFour

Period End	2020-04-30	2019-04-30	2018-04-30	2017-04-30	2016-04-30	2015-04-30	2014-04-30	2013-04-30
Value	27.27	27.27	27.27	28.18	29.02	2.13	21.62	2.13
Percentage of SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePrice1	108.9	114.5	117.5	138.4	153.6	12.4	133.4	14.9

avav:ExercisePriceRangeOne

Period End	2020-04-30	2019-04-30	2018-04-30	2017-04-30	2016-04-30	2014-04-30	2013-04-30
Value	17.9	14.56	13.78	7.45	0.59	0.59	0.37
Percentage of SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePrice1	71.5	61.1	59.4	36.6	3.1	3.6	2.6

avav:ExercisePriceRangeSix

Period End	2020-04-30	2015-04-30	2013-04-30
Value	31.13	21.43	22.21
Percentage of SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePrice1	124.4	124.4	155.6

avav:ExercisePriceRangeThree

Period End	2020-04-30	2019-04-30	2018-04-30	2017-04-30	2016-04-30	2014-04-30	2013-04-30
Value	26.7	26.7	26.7	24.91	21.51	11.79	0.78
Percentage of SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePrice1	106.7	112.1	115.1	122.3	113.9	72.7	5.5

avav:ExercisePriceRangeTwo

Period End	2020-04-30	2019-04-30	2018-04-30	2017-04-30	2016-04-30	2015-04-30	2014-04-30	2013-04-30
Value	20.54	20.54	20.71	19.97	11.79	0.59	2.13	0.59
Percentage of SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePrice1	82.1	86.2	89.3	98.1	62.4	3.4	13.1	4.1

us-gaap:SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1

Period End	2020-04-30	2019-04-30	2018-04-30	2017-04-30	2016-04-30	2015-04-30	2014-04-30	2013-04-30
Value	25.11	24.24	24.02	21.83	21.43	20.04	19.56	17.52
Percentage of SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1 us-gaap:ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRange

avav:ExercisePriceRangeFive

Period End	2020-04-30	2019-04-30	2018-04-30	2017-04-30	2015-04-30	2014-04-30	2013-04-30
Value	28.72	29.85	29.9	30.94	11.79	28.54	11.79
Percentage of SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1	114.4	123.1	124.5	141.7	58.8	145.9	67.3

avav:ExercisePriceRangeFour

Period End	2020-04-30	2019-04-30	2018-04-30	2017-04-30	2016-04-30	2015-04-30	2014-04-30	2013-04-30
Value	27.27	27.27	27.27	28.0	28.23	2.13	20.67	2.13
Percentage of SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1	108.6	112.5	113.5	128.3	131.7	10.6	105.7	12.2

avav:ExercisePriceRangeOne

Period End	2020-04-30	2019-04-30	2018-04-30	2017-04-30	2016-04-30	2014-04-30	2013-04-30
Value	17.9	14.56	13.78	8.15	0.59	0.59	0.37
Percentage of SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1	71.3	60.1	57.4	37.3	2.8	3.0	2.1

avav:ExercisePriceRangeSix

Period End	2020-04-30	2015-04-30	2013-04-30
Value	31.13	20.89	21.19
Percentage of SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1	124.0	104.2	120.9

avav:ExercisePriceRangeThree

Period End	2020-04-30	2019-04-30	2018-04-30	2017-04-30	2016-04-30	2014-04-30	2013-04-30
Value	26.7	26.7	26.7	25.77	21.15	11.79	0.78
Percentage of SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1	106.3	110.1	111.2	118.0	98.7	60.3	4.5

avav:ExercisePriceRangeTwo

Period End	2020-04-30	2019-04-30	2018-04-30	2017-04-30	2016-04-30	2015-04-30	2014-04-30	2013-04-30
Value	20.54	20.54	20.54	19.87	11.79	0.59	2.13	0.59
Percentage of SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1	81.8	84.7	85.5	91.0	55.0	2.9	10.9	3.4

us-gaap:StandardProductWarrantyAccrual

Period End	2020-10-31	2020-08-01	2020-04-30	2020-01-25	2019-10-26	2019-07-27	2019-04-30	2019-01-26	2018-10-27	2018-07-28	2018-04-30	2018-01-27	2017-10-28	2017-07-29	2017-04-30	2017-01-28	2016-10-29	2016-07-30	2016-04-30	2016-01-30	2015-10-31	2015-07-31	2015-04-30	2015-01-31	2014-11-01	2014-08-02	2014-04-30	2014-01-25	2013-10-26	2013-07-27	2013-04-30	2013-01-26	2012-10-27	2012-07-28	2012-04-30	2012-01-28	2011-10-29	2011-07-30	2011-04-30
Value	2.126	2.031	2.015	1.836	1.875	1.713	1.704	2.13	2.431	3.138	2.09	3.865	3.084	2.885	3.231	3.454	3.688	5.223	4.134	2.862	2.338	2.029	2.653	2.136	1.959	1.273	1.28	1.857	1.64	1.691	1.515	1.369	1.259	2.633	2.872	1.647	1.344	1.046	1.127
Percentage of StandardProductWarrantyAccrual	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:TaxCreditCarryforwardAmount us-gaap:IncomeTaxAuthority

us-gaap:TaxCreditCarryforwardAmount

us-gaap:StateAndLocalJurisdiction

Period End	2020-04-30	2019-04-30	2018-04-30	2017-04-30	2016-04-30	2015-04-30	2014-04-30
Value	26	23	20	18	16	13	11
Percentage of TaxCreditCarryforwardAmount	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:TaxCreditCarryforwardAmount us-gaap:IncomeTaxAuthorityName

us-gaap:InternalRevenueServiceIRS

Period End	2020-04-30	2019-04-30	2018-04-30	2017-04-30	2016-04-30	2015-04-30
Value	2.729	4.727	5.098	7.003	6.144	2.654
Percentage of TaxCreditCarryforwardAmount	10.2	19.8	24.6	38.5	37.2	19.6

us-gaap:UnbilledReceivablesCurrent

Period End	2020-10-31	2020-08-01	2020-04-30	2020-01-25	2019-10-26	2019-07-27	2019-04-30	2019-01-26	2018-10-27	2018-07-28	2018-04-30
Value	70	73	75	77	62	47	53	51	45	59	16
Percentage of UnbilledReceivablesCurrent	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued

Period End	2020-04-30	2019-04-30	2018-04-30	2016-04-30	2015-04-30	2014-04-30	2013-04-30	2012-04-30
Value	21000.0	18000.0	16000.0	55000.0	43000.0	233000.0	238000.0	125000.0
Percentage of UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:ValuationAllowancesAndReservesBalance us-gaap:ValuationAllowancesAndReservesType

us-gaap:ValuationAllowancesAndReservesBalance

avav:ReserveForSelfInsuredMedicalClaims

Period End	2020-04-30	2019-04-30	2018-04-30	2017-04-30	2016-04-30	2015-04-30	2014-04-30	2013-04-30	2012-04-30	2011-04-30	2010-04-30
Value	0.753	0.944	1.003	1.329	1.176	1.293	1.281	1.428	1.448	0.898	1.014
Percentage of ValuationAllowancesAndReservesBalance	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0	100.0

us-gaap:AllowanceForCreditLoss

Period End	2020-04-30	2019-04-30	2018-04-30	2017-04-30	2016-04-30
Value	1.19	1.041	1.08	0.104	0.056
Percentage of ValuationAllowancesAndReservesBalance	158.0	110.3	107.7	7.8	4.8

us-gaap:InventoryValuationReserve

Period End	2020-04-30	2019-04-30	2018-04-30	2017-04-30	2016-04-30	2015-04-30	2014-04-30	2013-04-30	2012-04-30	2011-04-30	2010-04-30
Value	10	7.824	3.953	5.25	4.455	4.588	3.234	3.871	2.754	1.241	1.191
Percentage of ValuationAllowancesAndReservesBalance	1358.8	828.8	394.1	395.0	378.8	354.8	252.5	271.1	190.2	138.2	117.5

us-gaap:WarrantyReserves

Period End	2020-04-30	2019-04-30	2018-04-30	2017-04-30	2016-04-30	2015-04-30	2014-04-30	2013-04-30	2012-04-30	2011-04-30	2010-04-30
Value	2.015	1.704	2.09	3.231	4.134	2.653	1.28	1.515	2.872	1.127	0.804
Percentage of ValuationAllowancesAndReservesBalance	267.6	180.5	208.4	243.1	351.5	205.2	99.9	106.1	198.3	125.5	79.3