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Stock Compensation - Schedule of Stock Compensation Expense Included In The Company's Condensed Consolidated Statements of Operations And Comprehensive Loss (Detail) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2023
Jun. 30, 2022
Jun. 30, 2023
Jun. 30, 2022
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Total share-based compensation expense $ 23,411 $ 15,147 $ 44,929 $ 28,602
Research and development expenses [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Total share-based compensation expense 13,118 8,139 24,713 15,249
General and administrative expenses [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Total share-based compensation expense $ 10,293 $ 7,008 $ 20,216 $ 13,353