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Relationship with Parent and Related Entities - Schedule Of Share-Based Payment Arrangement, Expensed and Capitalized, Amount (Detail) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Sep. 30, 2022
Sep. 30, 2021
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]        
Share-Based Payment Arrangement, Expense $ 5,279 $ 3,810 $ 12,273 $ 11,606
Research and Development Expense [Member]        
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]        
Share-Based Payment Arrangement, Expense 3,079 2,395 7,243 6,902
General and Administrative Expense [Member]        
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]        
Share-Based Payment Arrangement, Expense $ 2,200 $ 1,415 $ 5,030 $ 4,704