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Stock-based Compensation - Summary of Stock Based Compensation Expense Was Allocated (Detail) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]    
Allocated Share Based Compensation Expense $ 3,786 $ 2,756
Research and Development [Member]    
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]    
Allocated Share Based Compensation Expense 2,001 1,709
General and Administrative [Member]    
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]    
Allocated Share Based Compensation Expense $ 1,785 $ 1,047