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Equity - Equity Incentive Plan (Details) - USD ($) $ in Thousands | 9 Months Ended |
--- | --- | ---
Sep. 30, 2023 | Dec. 31, 2022
Inducement Stock Options |  |
Share-based compensation |  |
Fair value of options granted (in dollars) | $ 160 |
Share based compensation cost related to vesting awards | $ 62 |
Equity Incentive Plan |  |
Share-based compensation |  |
Outstanding options and restricted stock units | 3,467,000 | 3,202,000
Reserved but unissued shares under the Plans | 2,381,000 | 2,777,000
Total authorized shares under the Plans | 5,848,000 | 5,979,000
Increases in the number of authorized shares | 400,000 |
2021 Plan |  |
Share-based compensation |  |
Maximum number of shares that may be issued as a proportion of outstanding stock | 10.00% |
Maximum increase in number of shares available for issuance | 400,000 |

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