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Accrued Expenses (Detail) - USD ($)
$ in Thousands
Dec. 31, 2024
Dec. 31, 2023
Payables and Accruals [Abstract]    
Accrued professional fees $ 185 $ 356
Accrued compensation 200 423
Accrued royalties 47 45
Accrued advertising expenses 2 2
Accrued director compensation and liability insurance 63 100
Other 248 256
Accrued expenses $ 745 $ 1,182