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Accrued Expenses (Details) - USD ($)
$ in Thousands
Jun. 30, 2023
Dec. 31, 2022
Accrued Expenses    
Employee compensation, benefits, and related accruals $ 839 $ 870
Research and development costs 1,408 900
Legal reserves, professional fees, and other accruals 168 324
Total $ 2,415 $ 2,094