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Note 5 - Financing Arrangements - Long-term Debt (Details) - USD ($)
$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
Long-term debt gross   $ 7,148
Debt issuance Costs   (79)
Total long-term debt   7,069
Current maturities of long-term debt $ 0 (1,204)
Long-term debt - net of current maturities   5,865
Real Estate Term Note [Member]    
Long-term debt gross   1,071
Paycheck Protection Program CARES Act [Member]    
Long-term debt gross   $ 6,077
Total long-term debt $ 6,077