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Note 7 - Line of Credit and Long-term Debt (Details Textual) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2021
Oct. 01, 2021
Dec. 31, 2020
Long-term Debt, Gross $ 7,246   $ 1,269
Line of Credit [Member]      
Line of Credit Facility, Maximum Borrowing Capacity $ 5,000    
Line of Credit [Member] | London Interbank Offered Rate (LIBOR) [Member]      
Debt Instrument, Basis Spread on Variable Rate 5.50%    
Notes Payable [Member]      
Long-term Debt, Gross $ 4,400    
Notes Payable [Member] | Advantage Term Note 1 [Member]      
Debt Instrument, Face Amount   $ 1,400  
Debt Instrument, Interest Rate, Stated Percentage   4.00%  
Notes Payable [Member] | Advantage Term Note 2 [Member]      
Debt Instrument, Face Amount   $ 1,400  
Debt Instrument, Interest Rate, Stated Percentage   4.00%  
Notes Payable [Member] | Enhanced Term Note [Member]      
Debt Instrument, Face Amount   $ 1,800  
Debt Instrument, Interest Rate, Stated Percentage   4.00%  
Notes Payable [Member] | London Interbank Offered Rate (LIBOR) [Member]      
Debt Instrument, Basis Spread on Variable Rate 6.50%