v3.26.3
Fair Value of Financial Instruments - Schedule of Level 3 Earnout Shares Liabilities (Detail) - Founder Holder Earnout Shares Liabilities [Member] - USD ($)
$ in Thousands
9 Months Ended 12 Months Ended
Sep. 30, 2026
Dec. 31, 2025
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Opening value $ 4,281 $ 996
Change in fair value during the period (415) 3,285
Ending value $ 3,866 $ 4,281