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Accrued Expenses - Schedule of Accrued Expenses (Detail) - USD ($)
$ in Thousands
Sep. 30, 2025
Dec. 31, 2024
Payables and Accruals [Abstract]    
Payroll related $ 11 $ 126
Professional fees 134 205
Restructuring costs 681 1,656
Other 32 50
Total accrued expenses $ 858 $ 2,037