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Details of Certain Balance Sheet Accounts (Schedule of Accrued Expenses) (Details) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Details Of Certain Balance Sheet Accounts [Abstract]    
Current portion of operating lease liabilities $ 9,283 $ 7,234
Accrued health insurance 5,607 4,140
Accrued professional fees 4,220 2,517
Payor advances 4,206  
Accrued payroll taxes 4,543 1,843
Other 9,705 6,695
Total accrued expenses $ 37,564 $ 22,429