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Accrued Expenses and Other Current Liabilities (Details) - USD ($)
$ in Thousands
Sep. 30, 2022
Dec. 31, 2021
Accrued Expenses and Other Current Liabilities    
Employee compensation and benefits $ 3,059 $ 3,071
External research and development costs 2,125 5,056
Legal and professional fees 553 656
Other 210 215
Total accrued expenses and other current liabilities $ 5,947 $ 8,998