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Note 9 - Line of Credit (Details Textual) - PNC Bank [Member] - USD ($)
Aug. 25, 2020
Jan. 28, 2023
Dec. 17, 2021
Letters of Credit Outstanding, Amount   $ 500,000  
Revolving Credit Facility [Member]      
Debt Instrument, Covenant, Availability Percentage     10.00%
Debt Instrument, Covenant, Availability, Amount     $ 1,875,000
Debt Instrument, Default, Increase in Interest Rate and Fees 2.00%    
Long-term Line of Credit, Total $ 0 0  
Line of Credit Facility, Remaining Borrowing Capacity   25,000,000.0  
Line of Credit Facility, Current Borrowing Capacity   $ 24,500,000  
Letter of Credit [Member]      
Letters of Credit Outstanding, Amount $ 500,000