Annual report pursuant to Section 13 and 15(d)

Note 5 - Financing Arrangements (Details Textual)

v3.21.1
Note 5 - Financing Arrangements (Details Textual) - USD ($)
12 Months Ended
May 31, 2021
May 20, 2021
Apr. 19, 2020
Mar. 28, 2021
Mar. 29, 2020
Selling, General and Administrative Expense, Total       $ 14,218,000 $ 13,853,000
Long-term Line of Credit, Total       0  
Letters of Credit Outstanding, Amount       0  
Line of Credit Facility, Remaining Borrowing Capacity       26,000,000 20,100,000
Proceeds from (Repayments of) Notes Payable, Total       1,964,000
Paycheck Protection Program CARES Act [Member]          
Proceeds from (Repayments of) Notes Payable, Total     $ 1,963,800    
Subsequent Event [Member] | Paycheck Protection Program CARES Act [Member]          
Debt Instrument, Decrease, Forgiveness   $ 1,963,800      
Interest Payable   $ 22,000      
Revolving Credit Facility [Member]          
Line of Credit Facility, Maximum Borrowing Capacity       $ 26,000,000  
Long-term Line of Credit, Total         2,600,000
Letters of Credit Outstanding, Amount         0
Revolving Credit Facility [Member] | Prime Rate [Member]          
Debt Instrument Basis Spread Below Variable Rate       0.50%  
Debt Instrument, Basis Spread on Variable Rate       2.00%  
Debt Instrument, Interest Rate, Effective Percentage       1.25%  
Revolving Credit Facility [Member] | Prime Rate [Member] | Subsequent Event [Member]          
Debt Instrument Basis Spread Below Variable Rate 1.00%        
Revolving Credit Facility [Member] | London Interbank Offered Rate (LIBOR) [Member]          
Debt Instrument, Basis Spread on Variable Rate       1.75%  
Debt Instrument, Interest Rate, Effective Percentage       1.87%  
Revolving Credit Facility [Member] | London Interbank Offered Rate (LIBOR) [Member] | Subsequent Event [Member]          
Debt Instrument, Basis Spread on Variable Rate 1.50%        
Letter of Credit [Member]          
Line of Credit Facility, Maximum Borrowing Capacity       $ 1,500,000  
Factoring Agreements [Member]          
Long-term Debt, Total       0 0
Factoring Fees [Member]          
Selling, General and Administrative Expense, Total       $ 291,000 $ 255,000