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Balance Sheet Components - Schedule of Accrued Expenses and Other Current Liabilities (Details) - USD ($)
$ in Thousands
Sep. 30, 2023
Jun. 30, 2023
Dec. 31, 2022
Balance Sheet Components [Abstract]      
Compensation and benefits   $ 980 $ 745
Professional services   64 2,176
Accrued interest   158 132
Accrued clinical trial and preclinical costs   304 404
Other   351 70
Total accured expense and other current liabilities $ 1,857 $ 1,857 $ 3,527