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Balance Sheet Components - Schedule of Accrued Expenses and Other Current Liabilities (Detail) - USD ($) $ in Thousands | Dec. 31, 2021 | Dec. 31, 2020
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Balance Sheet Related Disclosures [Abstract] |  |
Compensation expense | $ 9,209 | $ 8,344
Accrued professional fees | 550 | 1,075
Accrued nonclinical costs | 2,895 | 1,824
Accrued clinical and process development costs | 2,058 | 1,020
State taxes payable | 1,318 | 40
Other | 2,017 | 1,285
Total accrued expenses and other current liabilities | $ 18,047 | $ 13,588

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