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Income Taxes - Schedule of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands | Dec. 31, 2025 | Dec. 31, 2024 | Dec. 31, 2023
--- | --- | --- | ---
Deferred tax assets: |  |  |
Net operating losses | $ 152,074 | $ 143,896 |
Research and development tax credits | 21,198 | 20,513 |
Amortization | 489 | 603 |
Lease liability | 2,354 | 2,625 |
Stock based compensation | 1,583 | 1,167 |
Other | 98 | 491 |
Capitalized R&D | 7,901 | 10,041 |
Total gross deferred tax assets | 185,697 | 179,336 |
Less: valuation allowance | (183,498) | (176,799) | $ (164,643)
Total deferred tax assets | 2,199 | 2,537 |
Deferred tax liability: |  |  |
Right-of-use assets | (2,180) | (2,518) |
Fixed assets | (19) | (19) |
Total gross deferred tax liabilities | (2,199) | (2,537) |
Net deferred tax assets | $ 0 | $ 0 |

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