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Fair Value Measurements - Schedule of Aggregate Fair Value of Warrant Liability (Detail) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2025
Sep. 30, 2024
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Change in fair value of warrant liabilities $ (564) $ (96,439) $ (22,917) $ (51,829)
Fair Value, Recurring [Member] | Warrant [Member]        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Balance as of December 31, 2024     44,865  
Change in fair value of warrant liabilities     (22,917)  
Balance as of June 30, 2025 $ 21,948   $ 21,948