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Note 7 - Debt and Credit Agreements - Outstanding Debt Balances (Details) - USD ($)
$ in Thousands
Mar. 31, 2021
Dec. 31, 2020
Long-term Debt, Total $ 228 $ 228
Less: Current portion (5,076) (1,406)
Long-term Debt, Excluding Current Maturities, Total 9,380 9,381
Line of Credit [Member]    
Long-term Debt, Total 4,468 1,245
Paycheck Protection Program CARES Act [Member]    
Long-term Debt, Total 9,151 9,151
Long-term Debt, Excluding Current Maturities, Total 9,151  
Notes Payable, Other Payables [Member]    
Long-term Debt, Total 609 163
Less: Current portion $ (609) $ (161)