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Balance Sheet Details - Schedule of Accounts Payable (Detail) - USD ($) $ in Thousands | Sep. 30, 2022 | Dec. 31, 2021
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Organization, Consolidation and Presentation of Financial Statements [Abstract] |  |
Clinical costs | $ 3,748 | $ 3,427
Legal and audit costs | 114 | 72
Other | 310 | 246
Total | $ 4,172 | $ 3,745

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