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Fair Value of Financial Instruments - Schedule of Level 3 Earnout Shares Liability (Detail) - Founder Holder Earnout Shares Liability [Member] $ in Thousands | 9 Months Ended
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Sep. 30, 2025 USD ($)
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |
Opening value | $ 996
Change in fair value during the period | 2,655
Ending value | $ 3,651

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