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Balance Sheet Components - Schedule of Accrued Liabilities (Detail) - USD ($)
$ in Thousands
Mar. 31, 2023
Dec. 31, 2022
Balance Sheet Related Disclosures [Abstract]    
Accrued payroll and related expenses $ 1,870 $ 3,964
Accrued research and development expenses 2,054 1,665
Accrued restructuring charges 481 0
Accrued professional service fees 432 638
Liability for early exercised stock options 38 89
Other 449 492
Accrued and other liabilities $ 5,324 $ 6,848