Quarterly report pursuant to Section 13 or 15(d)

Accounts Payable and Accrued Expenses (Details)

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Accounts Payable and Accrued Expenses (Details) - USD ($)
$ in Thousands
Sep. 30, 2021
Dec. 31, 2020
Accounts Payable and Accrued Liabilities, Current [Abstract]    
Accounts payable $ 6,428 $ 4,597
Accrued expenses 6,361 3,778
Accrued compensation 8,896 13,593
Accounts Payable and Accrued Expenses $ 21,685 $ 21,968