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Balance Sheet Details - Schedule of Accounts Payable (Detail) - USD ($)
$ in Thousands
Sep. 30, 2022
Dec. 31, 2021
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