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Accrued Expenses (Details) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Accrued Expenses    
Compensation and related benefits $ 3,666 $ 2,314
Interest 40 41
Third-party and professional fees 1,626 641
Other 621 546
Accrued Expenses, Total $ 5,953 $ 3,542