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| 2024-03-31 | 2023-12-31 | 2023-09-30 | 2023-06-30 | 2023-03-31 | 2022-12-31 | 2022-09-30 | 2022-06-30 | 2022-03-31 | 2021-12-31 | 2021-09-30 | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Common Stock Value | 0.07 | 0.07 | 0.06 | 0.06 | 0.06 | 0.06 | 0.06 | 0.04 | 0.03 | 0.03 | 0.02 | 0.02 | 0.02 | 0.02 | 0.02 | 0.02 | 0.02 | 0.02 | 0.02 | 0.02 | 0.00 | 0.00 | |
| Weighted Average Number Of Diluted Shares Outstanding | 99.52 | NA | 99.33 | 98.70 | 98.61 | NA | 68.90 | 59.54 | 30.81 | NA | 21.61 | 20.12 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | |
| Weighted Average Number Of Shares Outstanding Basic | 99.52 | NA | 99.33 | 98.70 | 98.61 | NA | 68.90 | 59.54 | 30.81 | NA | 21.61 | 20.12 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | |
| Earnings Per Share Basic | -0.11 | -0.08 | -0.08 | -0.07 | -0.06 | -0.01 | -0.12 | -0.14 | -0.24 | -0.24 | -0.34 | -0.49 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | |
| Earnings Per Share Diluted | -0.11 | -0.08 | -0.08 | -0.07 | -0.06 | -0.01 | -0.12 | -0.14 | -0.24 | -0.24 | -0.34 | -0.49 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| 2024-03-31 | 2023-12-31 | 2023-09-30 | 2023-06-30 | 2023-03-31 | 2022-12-31 | 2022-09-30 | 2022-06-30 | 2022-03-31 | 2021-12-31 | 2021-09-30 | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Operating Expenses | 11.91 | 8.93 | 9.04 | 8.38 | 7.56 | 6.66 | 8.40 | 7.82 | 7.03 | 8.27 | 6.95 | 9.17 | 8.09 | 9.19 | 7.24 | 7.41 | 8.64 | 6.77 | 7.65 | 7.42 | 4.81 | 5.93 | |
| Research And Development Expense | 8.80 | 6.52 | 6.32 | 5.84 | 5.00 | 4.32 | 5.77 | 5.10 | 4.64 | 6.18 | 4.72 | 6.50 | 5.59 | 6.56 | 4.83 | 4.92 | 6.02 | 4.82 | 5.65 | 5.53 | 3.34 | 4.52 | |
| General And Administrative Expense | 3.10 | 2.42 | 2.72 | 2.54 | 2.56 | 2.34 | 2.64 | 2.72 | 2.38 | 2.09 | 2.23 | 2.67 | 2.50 | 2.63 | 2.42 | 2.49 | 2.62 | 1.94 | 2.00 | 1.89 | 1.47 | 1.41 | |
| Operating Income Loss | -11.91 | -8.93 | -9.04 | -8.38 | -7.56 | -6.66 | -8.40 | -7.82 | -7.03 | -8.27 | -6.95 | -9.17 | -8.09 | -9.19 | -7.24 | -7.41 | -8.64 | -6.77 | -7.65 | -7.42 | -4.81 | -5.93 | |
| Interest Expense | 0.00 | 0.00 | 0.00 | 0.15 | 0.23 | 0.27 | 0.29 | 0.29 | 0.30 | 0.31 | 0.30 | 0.30 | 0.29 | 0.31 | 0.15 | NA | NA | NA | NA | NA | NA | 0.00 | |
| Interest Income Expense Nonoperating Net | 1.00 | 1.14 | 1.18 | 1.21 | 1.22 | 1.12 | 0.42 | 0.20 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.01 | 0.16 | 0.23 | 0.28 | 0.23 | 0.06 | 0.05 | |
| Income Tax Expense Benefit | -0.01 | 0.02 | -0.01 | -0.03 | -0.01 | -0.02 | -0.01 | -0.00 | -0.01 | -0.01 | 0.00 | -0.00 | -0.01 | 0.02 | -0.01 | -0.01 | -0.01 | -0.00 | -0.01 | -0.01 | -0.00 | -0.05 | |
| Net Income Loss | -10.90 | -7.82 | -7.70 | -7.14 | -6.40 | -5.50 | -8.27 | -8.05 | -7.33 | -8.52 | -7.25 | -9.79 | -8.37 | -9.52 | -7.38 | -7.38 | -8.47 | -6.54 | -7.37 | -7.35 | -4.80 | -5.94 | |
| Comprehensive Income Net Of Tax | -10.94 | -7.63 | -7.67 | -7.30 | -6.37 | -5.36 | -8.39 | -8.19 | -7.33 | -8.52 | -7.25 | -9.79 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| 2024-03-31 | 2023-12-31 | 2023-09-30 | 2023-06-30 | 2023-03-31 | 2022-12-31 | 2022-09-30 | 2022-06-30 | 2022-03-31 | 2021-12-31 | 2021-09-30 | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Assets | 78.56 | 89.40 | 95.90 | 100.98 | 116.20 | 123.02 | 128.36 | 81.41 | 30.39 | 38.48 | 31.60 | 39.15 | 42.86 | 47.13 | 55.88 | 47.01 | 54.24 | 60.00 | 66.02 | 75.12 | 17.18 | 10.53 | |
| Liabilities | 6.22 | 6.86 | 6.29 | 5.90 | 14.47 | 15.56 | 18.46 | 20.90 | 19.92 | 21.40 | 20.22 | 21.41 | 19.18 | 19.85 | NA | NA | NA | NA | NA | NA | NA | NA | |
| Liabilities And Stockholders Equity | 78.56 | 89.40 | 95.90 | 100.98 | 116.20 | 123.02 | 128.36 | 81.41 | 30.39 | 38.48 | 31.60 | 39.15 | 42.86 | 47.13 | 55.88 | 47.01 | 54.24 | 60.00 | 66.02 | 75.12 | 17.18 | 10.53 | |
| Stockholders Equity | 72.33 | 82.55 | 89.61 | 95.07 | 101.73 | 107.46 | 109.90 | 60.52 | 10.46 | 17.07 | 11.38 | 17.74 | 23.68 | 27.28 | 35.62 | 40.04 | 46.80 | 54.55 | 60.71 | 67.70 | -115.48 | -109.49 |
| 2024-03-31 | 2023-12-31 | 2023-09-30 | 2023-06-30 | 2023-03-31 | 2022-12-31 | 2022-09-30 | 2022-06-30 | 2022-03-31 | 2021-12-31 | 2021-09-30 | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Assets Current | 76.77 | 87.55 | 93.95 | 99.21 | 114.20 | 122.62 | 127.32 | 79.89 | 29.84 | 37.96 | 30.71 | 38.48 | 42.16 | 46.27 | 55.21 | 46.34 | 53.82 | 59.55 | 65.54 | 74.61 | 14.76 | 8.82 | |
| Cash And Cash Equivalents At Carrying Value | 13.81 | 32.40 | 25.96 | 13.75 | 11.65 | 12.59 | 66.57 | 24.70 | 29.11 | 36.83 | 29.32 | 36.42 | 41.57 | 45.00 | 53.29 | 44.18 | 52.64 | 57.31 | 63.52 | 71.39 | 12.95 | 7.20 | |
| Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents | 13.81 | 32.40 | 25.96 | 13.75 | 11.65 | 12.59 | 66.57 | 24.70 | 29.11 | 36.83 | 29.32 | 36.42 | 41.57 | 45.00 | 53.29 | 44.18 | 52.64 | 57.31 | 63.52 | 71.39 | 12.95 | 7.20 | |
| Marketable Securities Current | 59.01 | 50.57 | 62.90 | 80.40 | 99.61 | 107.92 | 59.03 | 53.16 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | |
| Other Assets Current | 0.72 | 0.95 | 1.05 | 2.08 | 1.61 | 1.31 | 0.42 | 0.38 | 0.25 | 0.24 | NA | NA | NA | 0.27 | NA | NA | NA | NA | NA | NA | NA | NA | |
| Available For Sale Securities Debt Securities | 59.01 | 50.57 | 62.90 | 80.40 | 99.61 | 107.92 | 59.03 | 54.16 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| 2024-03-31 | 2023-12-31 | 2023-09-30 | 2023-06-30 | 2023-03-31 | 2022-12-31 | 2022-09-30 | 2022-06-30 | 2022-03-31 | 2021-12-31 | 2021-09-30 | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Property Plant And Equipment Gross | NA | 0.35 | NA | NA | NA | 0.40 | NA | NA | NA | 0.23 | NA | NA | NA | 0.23 | NA | NA | NA | 0.20 | NA | NA | NA | 0.20 | |
| Accumulated Depreciation Depletion And Amortization Property Plant And Equipment | NA | 0.13 | NA | NA | NA | 0.23 | NA | NA | NA | 0.18 | NA | NA | NA | 0.13 | NA | NA | NA | 0.09 | NA | NA | NA | 0.05 | |
| Property Plant And Equipment Net | 0.20 | 0.22 | 0.24 | 0.23 | 0.24 | 0.17 | 0.07 | 0.03 | 0.04 | 0.05 | 0.07 | 0.08 | 0.09 | 0.10 | 0.11 | 0.11 | 0.11 | 0.12 | 0.13 | 0.14 | 0.15 | 0.15 | |
| Other Assets Noncurrent | 0.31 | 0.30 | 0.30 | 0.07 | 0.23 | 0.20 | 0.92 | 0.41 | 0.40 | 0.33 | NA | NA | NA | 0.53 | NA | NA | NA | NA | NA | NA | NA | NA | |
| Available For Sale Debt Securities Amortized Cost Basis | 59.08 | 50.60 | 63.12 | 80.65 | 99.69 | 108.04 | 59.29 | 54.29 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA |
| 2024-03-31 | 2023-12-31 | 2023-09-30 | 2023-06-30 | 2023-03-31 | 2022-12-31 | 2022-09-30 | 2022-06-30 | 2022-03-31 | 2021-12-31 | 2021-09-30 | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Liabilities Current | 5.28 | 5.82 | 5.17 | 4.71 | 13.20 | 13.40 | 14.64 | 15.43 | 12.87 | 12.72 | 9.91 | 9.41 | 5.34 | 5.55 | 6.10 | 6.77 | 7.21 | 5.20 | 5.03 | 7.11 | 3.67 | 2.68 | |
| Accounts Payable Current | 2.11 | 1.81 | 1.26 | 1.35 | 1.98 | 2.86 | 2.33 | 3.94 | 1.74 | 2.85 | 2.23 | 3.49 | 0.80 | 2.02 | 1.26 | 3.16 | 2.19 | 1.60 | 0.49 | 2.66 | 0.50 | 0.60 | |
| Other Accrued Liabilities Current | 0.06 | 0.01 | 0.07 | 0.05 | 0.47 | 0.50 | 0.41 | 0.33 | 0.08 | 0.08 | 0.07 | 0.15 | 0.11 | 0.16 | 0.13 | 0.18 | 0.22 | 0.30 | 0.24 | 0.14 | 0.08 | 0.07 | |
| Accrued Liabilities Current | 2.84 | 3.71 | 3.62 | 3.08 | 3.47 | 3.52 | 5.25 | 4.40 | 3.88 | 3.81 | 3.31 | 3.32 | 3.85 | 3.43 | 4.74 | 3.50 | 4.91 | 3.50 | 4.45 | 4.35 | 3.08 | 2.07 |
| 2024-03-31 | 2023-12-31 | 2023-09-30 | 2023-06-30 | 2023-03-31 | 2022-12-31 | 2022-09-30 | 2022-06-30 | 2022-03-31 | 2021-12-31 | 2021-09-30 | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Operating Lease Liability Noncurrent | 0.95 | 1.00 | 1.05 | 1.10 | 1.15 | 0.00 | 0.00 | 0.00 | NA | 0.02 | 0.06 | 0.09 | 0.12 | 0.14 | 0.17 | 0.20 | 0.23 | 0.26 | 0.28 | 0.31 | 0.33 | 0.05 |
| 2024-03-31 | 2023-12-31 | 2023-09-30 | 2023-06-30 | 2023-03-31 | 2022-12-31 | 2022-09-30 | 2022-06-30 | 2022-03-31 | 2021-12-31 | 2021-09-30 | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Stockholders Equity | 72.33 | 82.55 | 89.61 | 95.07 | 101.73 | 107.46 | 109.90 | 60.52 | 10.46 | 17.07 | 11.38 | 17.74 | 23.68 | 27.28 | 35.62 | 40.04 | 46.80 | 54.55 | 60.71 | 67.70 | -115.48 | -109.49 | |
| Common Stock Value | 0.07 | 0.07 | 0.06 | 0.06 | 0.06 | 0.06 | 0.06 | 0.04 | 0.03 | 0.03 | 0.02 | 0.02 | 0.02 | 0.02 | 0.02 | 0.02 | 0.02 | 0.02 | 0.02 | 0.02 | 0.00 | 0.00 | |
| Additional Paid In Capital | 322.37 | 321.64 | 321.08 | 318.87 | 318.23 | 317.59 | 314.67 | 256.91 | 198.68 | 197.96 | 183.75 | 182.86 | 179.01 | 174.24 | 173.05 | 170.09 | 169.48 | 168.75 | NA | NA | NA | NA | |
| Retained Earnings Accumulated Deficit | -250.04 | -239.13 | -231.31 | -223.62 | -216.47 | -210.07 | -204.56 | -196.30 | -188.25 | -180.92 | -172.40 | -165.14 | -155.35 | -146.98 | -137.45 | -130.08 | -122.69 | -114.22 | -107.68 | -100.32 | -115.48 | -109.50 | |
| Accumulated Other Comprehensive Income Loss Net Of Tax | -0.07 | -0.03 | -0.22 | -0.25 | -0.09 | -0.12 | -0.26 | -0.14 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | |
| Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value | 0.72 | 0.53 | 0.53 | 0.61 | 0.58 | 0.50 | 0.57 | 0.52 | 0.74 | 0.54 | 0.54 | 0.74 | 0.72 | 0.51 | 0.59 | 0.59 | 0.73 | 0.37 | 0.37 | 0.24 | 0.15 | 0.18 |
| 2024-03-31 | 2023-12-31 | 2023-09-30 | 2023-06-30 | 2023-03-31 | 2022-12-31 | 2022-09-30 | 2022-06-30 | 2022-03-31 | 2021-12-31 | 2021-09-30 | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Net Cash Provided By Used In Operating Activities | -10.47 | -6.36 | -7.28 | -9.88 | -8.20 | -6.33 | -8.58 | -6.18 | -7.09 | -6.23 | -7.24 | -7.90 | -7.58 | -8.92 | -6.97 | -8.44 | -4.67 | -6.20 | -7.73 | -5.06 | -4.10 | -4.73 | |
| Net Cash Provided By Used In Investing Activities | -8.09 | 12.85 | 17.98 | 19.64 | 8.96 | -48.31 | -4.85 | NA | NA | NA | NA | NA | NA | -0.01 | -0.01 | NA | NA | 0.00 | 0.00 | 0.00 | -0.01 | -0.09 | |
| Net Cash Provided By Used In Financing Activities | -0.03 | -0.05 | 1.51 | -7.66 | -1.70 | 0.65 | 55.30 | 55.98 | -0.62 | 13.74 | 0.13 | 2.75 | 4.15 | 0.64 | 16.09 | NA | NA | 0.00 | -0.14 | 63.50 | 9.85 | -1.51 |
| 2024-03-31 | 2023-12-31 | 2023-09-30 | 2023-06-30 | 2023-03-31 | 2022-12-31 | 2022-09-30 | 2022-06-30 | 2022-03-31 | 2021-12-31 | 2021-09-30 | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Net Cash Provided By Used In Operating Activities | -10.47 | -6.36 | -7.28 | -9.88 | -8.20 | -6.33 | -8.58 | -6.18 | -7.09 | -6.23 | -7.24 | -7.90 | -7.58 | -8.92 | -6.97 | -8.44 | -4.67 | -6.20 | -7.73 | -5.06 | -4.10 | -4.73 | |
| Net Income Loss | -10.90 | -7.82 | -7.70 | -7.14 | -6.40 | -5.50 | -8.27 | -8.05 | -7.33 | -8.52 | -7.25 | -9.79 | -8.37 | -9.52 | -7.38 | -7.38 | -8.47 | -6.54 | -7.37 | -7.35 | -4.80 | -5.94 | |
| Depreciation Depletion And Amortization | 0.04 | 0.04 | 0.04 | 0.03 | 0.02 | 0.01 | 0.01 | 0.01 | 0.01 | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | NA | |
| Increase Decrease In Accounts Payable | 0.29 | 0.63 | -0.17 | -0.59 | -0.91 | 0.54 | -1.47 | 2.05 | -1.11 | 0.61 | -1.25 | 2.69 | -1.22 | 0.76 | -1.90 | 0.97 | 0.59 | 1.11 | -2.05 | 1.90 | -0.18 | -0.06 | |
| Share Based Compensation | 0.72 | 0.53 | 0.53 | 0.61 | 0.58 | 0.50 | 0.57 | 0.52 | 0.74 | 0.54 | 0.54 | 0.74 | 0.72 | 0.51 | 0.59 | 0.59 | 0.73 | 0.37 | 0.37 | 0.24 | 0.15 | 0.18 |
| 2024-03-31 | 2023-12-31 | 2023-09-30 | 2023-06-30 | 2023-03-31 | 2022-12-31 | 2022-09-30 | 2022-06-30 | 2022-03-31 | 2021-12-31 | 2021-09-30 | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Net Cash Provided By Used In Investing Activities | -8.09 | 12.85 | 17.98 | 19.64 | 8.96 | -48.31 | -4.85 | NA | NA | NA | NA | NA | NA | -0.01 | -0.01 | NA | NA | 0.00 | 0.00 | 0.00 | -0.01 | -0.09 | |
| Payments To Acquire Property Plant And Equipment | NA | 0.02 | 0.02 | 0.04 | 0.06 | 0.12 | NA | NA | NA | NA | NA | NA | NA | 0.01 | 0.01 | NA | NA | 0.00 | 0.00 | 0.00 | 0.01 | 0.09 |
| 2024-03-31 | 2023-12-31 | 2023-09-30 | 2023-06-30 | 2023-03-31 | 2022-12-31 | 2022-09-30 | 2022-06-30 | 2022-03-31 | 2021-12-31 | 2021-09-30 | 2021-06-30 | 2021-03-31 | 2020-12-31 | 2020-09-30 | 2020-06-30 | 2020-03-31 | 2019-12-31 | 2019-09-30 | 2019-06-30 | 2019-03-31 | 2018-12-31 | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Net Cash Provided By Used In Financing Activities | -0.03 | -0.05 | 1.51 | -7.66 | -1.70 | 0.65 | 55.30 | 55.98 | -0.62 | 13.74 | 0.13 | 2.75 | 4.15 | 0.64 | 16.09 | NA | NA | 0.00 | -0.14 | 63.50 | 9.85 | -1.51 |
