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Equity-based Compensation - Compensation expense (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2024 | Sep. 30, 2023 | Sep. 30, 2024 | Sep. 30, 2023
Equity-based Compensation |  |  |  |
Total equity-based compensation | $ 896 | $ 1,071 | $ 3,214 | $ 3,283
Total unrecognized compensation cost related to options | 3,121 |  | $ 3,121 |
Weighted average period over which the unrecognized compensation cost is expected to be recognized |  |  | 1 year 10 months 20 days |
Performance-based awards |  |  |  |
Equity-based Compensation |  |  |  |
Total unrecognized compensation cost related to options | 628 |  | $ 628 |
Weighted average period over which the unrecognized compensation cost is expected to be recognized |  |  | 1 year 21 days |
Research and development |  |  |  |
Equity-based Compensation |  |  |  |
Total equity-based compensation | 291 | 176 | $ 804 | 489
General and administrative |  |  |  |
Equity-based Compensation |  |  |  |
Total equity-based compensation | $ 605 | $ 895 | $ 2,410 | $ 2,794

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