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Accounts Payable and Accrued Expenses - Accounts Payable and Accrued Expenses (Details) - USD ($)
$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
Payables And Accruals [Abstract]    
Trade payables $ 3,824 $ 3,041
Employee compensation, benefits, and related accruals 5,940 2,859
Consulting and contracted research 3,550 4,738
Professional fees 285 167
Other 118 69
Total $ 13,717 $ 10,874