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Accounts Payable, Accrued Expenses and Other - Schedule of Accounts Payable, Accrued Expenses and Other (Detail) - USD ($)
$ in Thousands
Mar. 31, 2024
Dec. 31, 2023
Payables And Accruals [Abstract]    
Accounts payable $ 168 $ 74
Accrued goods and services 161 130
Accrued clinical trial costs 46 46
Others 191 191
Total accounts payable, accrued expenses and other $ 566 $ 441