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Accrued Expenses - Summary of Accrued Expenses (Details) - USD ($)
$ in Thousands
Jun. 30, 2021
Dec. 31, 2020
Payables and Accruals [Abstract]    
Accrued payroll and related expenses $ 2,879 $ 6,686
Accrued operating expenses 2,904 1,545
Other accrued expenses 1,689 975
Total accrued expenses $ 7,472 $ 9,206