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Accrued Expenses (Details) - USD ($)
$ in Thousands
Jun. 30, 2022
Dec. 31, 2021
Accrued Expenses    
Employee compensation, benefits, and related accruals $ 748 $ 1,285
Research and development costs 555 250
Professional fees 338 216
Other accrued 26  
Total $ 1,667 $ 1,751