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Accrued Expenses and Other Current Liabilities - Schedule of Accrued Expenses and Other Current Liabilities (Details) - USD ($) $ in Thousands | Dec. 31, 2021 | Dec. 31, 2020
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Payables and Accruals [Abstract] |  |
Accrued research and development expenses | $ 9,122 | $ 6,649
Accrued compensation | 7,275 | 2,416
Unvested early exercised stock option liability | 2,884 | 2,526
Accrued construction in process | 1,272 |
Accrued professional services | 383 | 194
Other accruals | 483 | 140
Total | $ 21,419 | $ 11,925

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