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Balance Sheet Components - Summary of Accrued Expenses (Detail) - USD ($)
$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
Payables And Accruals [Abstract]    
Accrued research and development costs $ 39,147 $ 34,398
Employee-related 18,618 14,769
Professional services 8,893 5,184
Other 617 500
Total accrued expenses $ 67,275 $ 54,851