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Accrued Expenses - Component of Accrued Expenses (Details) - USD ($)
$ in Thousands
Dec. 31, 2023
Dec. 31, 2022
Payables and Accruals [Abstract]    
Clinical $ 568 $ 2,200
Employee compensation 43 1,160
Professional services 717 534
Preclinical services 0 198
Manufacturing services 12 1,177
Other consulting services 0 16
Other 0 169
Total $ 1,340 $ 5,454