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Accrued Expenses and Other Current Liabilities - Summary of Other Current Liabilities (Detail) - USD ($) $ in Thousands | Sep. 30, 2025 | Dec. 31, 2024
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Accrued Liabilities and Other Liabilities [Abstract] |  |
Deferred transaction costs | $ 3,150 | $ 3,150
Unearned revenue | 608 | 411
Forward commitment liability | 454 | 0
Other | 777 | 571
Total | $ 4,989 | $ 4,132

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