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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
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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

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- Definition Carrying amount as of the balance sheet date of payroll taxes previously overpaid to tax authorities (such as U.S. Federal, state and local tax authorities) representing refunds of overpayments or recoveries based on agreed-upon resolutions of disputes. + References No definition available. + Details
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