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Prepaid Expenses and Other Current Assets - Schedule of Prepaid Expenses and Other Current Assets (Detail) - USD ($)
$ in Thousands
Mar. 31, 2022
Dec. 31, 2021
Prepaid Expense and Other Assets [Abstract]    
Prepaid research and development expenses $ 1,146 $ 676
Prepaid insurance 553 944
Payroll tax receivable 323 208
Other prepaid expenses and other assets 293 279
Total prepaid expenses and other current assets $ 2,315 $ 2,107