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Accounts Payable and Accrued Expenses (Details) - USD ($)
$ in Thousands
Jun. 30, 2021
Dec. 31, 2020
Accounts Payable and Accrued Liabilities, Current [Abstract]    
Accounts payable $ 6,721 $ 4,597
Accrued expenses 5,480 3,778
Accrued compensation 7,638 13,593
Accounts Payable and Accrued Expenses $ 19,839 $ 21,968