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Note 7 - Debt and Credit Agreements - Outstanding Debt Balances (Details) - USD ($)
$ in Thousands
Jun. 30, 2021
Dec. 31, 2020
Long-term Debt, Total $ 228 $ 228
Less: Current portion (6,392) (1,406)
Long-term debt, net of current maturities 228 9,381
Line of Credit [Member]    
Long-term Debt, Total 6,000 1,245
Paycheck Protection Program CARES Act [Member]    
Long-term Debt, Total 0 9,151
Notes Payable, Other Payables [Member]    
Long-term Debt, Total 392 163
Less: Current portion $ (392) $ (161)