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Accrued Expenses - Summary of Accrued Expenses (Details) - USD ($)
$ in Thousands
Mar. 31, 2024
Dec. 31, 2023
Accrued Liabilities, Current [Abstract]    
Employee compensation and benefits $ 418 $ 187
External research and development expenses 406 635
Professional and consulting fees 519 669
Other 187 75
Total accrued expenses $ 1,530 $ 1,566