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Accounts Payable and Accrued Expenses (Details) - USD ($)
$ in Thousands
Mar. 31, 2021
Dec. 31, 2020
Accounts Payable and Accrued Liabilities, Current [Abstract]    
Accounts payable $ 9,157 $ 4,597
Accrued expenses 5,434 3,778
Accrued compensation 6,240 13,593
Accounts Payable and Accrued Expenses $ 20,831 $ 21,968