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Short-Term and Long-Term Debt, Including Finance Leases - Long-term debt instruments (Details) - USD ($)
Dec. 31, 2021
Dec. 31, 2020
Debt Instrument [Line Items]    
Finance lease and other obligations $ 425,000 $ 740,000
Finance Lease, Liability, Statement of Financial Position [Extensible Enumeration] Liabilities, Current Liabilities, Current
Total long-term debt and finance leases $ 175,019,000 $ 113,595,000
Less: portion of Credit Facility classified as short term (10,704,000) (1,837,000)
Less: current installments of finance leases and other obligations (88,000) (267,000)
Total long-term debt and finance leases, less current installments 164,315,000 111,758,000
Credit Facility    
Debt Instrument [Line Items]    
Credit Facility 174,594,000 112,855,000
Less: portion of Credit Facility classified as short term $ (10,616,000) $ (1,570,000)