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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, 2025
Sep. 30, 2024
Liability Related to Sale of Future Royalties [Abstract]    
Liability related to sale of future revenues - beginning balance $ 59,324  
Interest paid (450) $ (5,700)
Interest expense recognized 6,109  
Liability related to sale of future revenues - ending balance 64,983  
Less: Current portion classified to accrued and other current liabilities (1,569)  
Liability related to sale of future revenues, non-current $ 63,414