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Liability Related to Sale of Future Revenues - Schedule of Activities of Liability Related to Sale of Future Revenues (Detail) - USD ($)
$ in Thousands
 9 Months Ended
Sep. 30, 2023
Sep. 30, 2022
Liability Related to Sale of Future Royalties [Abstract]    
Liability related to sale of future revenues - beginning balance $ 49,333  
Interest expense recognized 5,636 $ 0
Liability related to sale of future revenues - ending balance 54,969  
Less: Current portion classified to accrued and other current liabilities (5,860)  
Liability related to sale of future revenues, non-current $ 49,109