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Extraordinary and Unusual Items (Details) - USD ($)
3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2021
Dec. 31, 2020
Sep. 30, 2021
Sep. 30, 2021
Sep. 30, 2020
Dec. 31, 2020
Jul. 22, 2020
Restructuring Costs     $ 0 $ 1,239,000   $ 7,181,000  
Line of Credit Facility, Maximum Borrowing Capacity             $ 150,000,000
Payments to Employees         $ 100,000    
Salary Reduction Percentage for Executives         30.00%    
Accrued Liabilities              
Restructuring Costs $ 231,000 $ 490,000