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Stockholders' Equity And Stock-Based Compensation Expense (Tables) | 3 Months Ended
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Mar. 31, 2022
Stockholders' Equity And Stock-Based Compensation [Abstract] |
Stock Options And Unvested Performance Award Outstanding Activity |
|  | Stock Options |  |  | Performance Awards
Outstanding as of December 31, 2021 |  | 2,663,727 |  |  | 138,055
Options granted |  | 1,000 |  |  | —
Options exercised |  | (19,609) |  |  | —
Options forfeited/canceled |  | — |  |  | —
Outstanding as of March 31, 2022 |  | 2,645,118 |  |  | 138,055
Stock-Based Compensation Expense |
| Three months ended |
| March 31, |
| 2022 |  | 2021 |
Research and development | $ | 422 |  | $ | 120 |
General and administrative |  | 73 |  |  | 130 |
Total stock-based compensation expense | $ | 495 |  | $ | 250 |

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