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Accrued Expenses - Summary of Accrued Expense (Details) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Payables And Accruals [Abstract]    
Compensation and related benefits $ 3,614 $ 1,631
Research and development 3,421 658
Other 420 314
Accrued expenses and other current liabilities $ 7,455 $ 2,603