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Accrued Expenses - Schedule of Accrued Expenses (Details) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Payables And Accruals [Abstract]    
Employee compensation and benefits $ 3,314 $ 1,520
Professional fees 696 445
Research and development 3,347 3,051
Other 173 147
Total accrued expenses $ 7,530 $ 5,163