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Note 14 - Debt - Schedule of Debt (Details) - USD ($)
$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
Debt Instrument $ 31,492,000  
Unamortized discount and deferred issuance costs (1,763,000) $ (1,538,000)
Total debt 29,729,000 26,729,000
Less: current portion (2,166,000) (1,069,000)
Total long-term debt 27,563,000 25,660,000
Notes Payable to Banks [Member]    
Debt Instrument 29,508,000 26,608,000
Equipment Trust Certificate [Member]    
Debt Instrument 848,000 885,000
Commercial Paper [Member]    
Debt Instrument 400,000 75,000
Finance Lease [Member]    
Debt Instrument 336,000 449,000
Secured Debt [Member]    
Debt Instrument 300,000 0
Loans Payable [Member]    
Debt Instrument $ 100,000 $ 250,000