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Accrued Expenses and Other Liabilities - Schedule of Accrued Expenses and Other Liabilities (Detail) - USD ($)
$ in Thousands
Mar. 31, 2022
Dec. 31, 2021
Accrued Liabilities And Other Liabilities [Abstract]    
Accrued compensation and related expenses $ 814 $ 1,411
Accrued severance 31 104
Accrued clinical 599 454
Accrued professional services 129 167
Accrued other 31 83
Total accrued expenses and other liabilities $ 1,604 $ 2,219