Annual report pursuant to Section 13 and 15(d)

Note 5 - Financing Arrangements (Details Textual)

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Note 5 - Financing Arrangements (Details Textual) - USD ($)
12 Months Ended
Mar. 31, 2024
Apr. 02, 2023
Dec. 31, 2023
Selling, General and Administrative Expense $ 16,105,000 $ 12,655,000  
Long-Term Line of Credit 8,100,000 12,700,000  
Letters of Credit Outstanding, Amount 0   $ 0
Line of Credit Facility, Remaining Borrowing Capacity 19,200,000 20,000,000  
Revolving Credit Facility [Member]      
Line of Credit Facility, Maximum Borrowing Capacity $ 35,000,000    
Revolving Credit Facility [Member] | Prime Rate [Member]      
Debt Instrument Basis Spread Below Variable Rate 0.50%    
Debt Instrument, Interest Received on Daily Negative Balances, Basis Spread Below Variable Rate 2.00%    
Revolving Credit Facility [Member] | Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]      
Debt Instrument, Basis Spread on Variable Rate 1.60%    
Debt Instrument, Interest Rate, Effective Percentage 6.90%    
Letter of Credit [Member]      
Line of Credit Facility, Maximum Borrowing Capacity $ 1,500,000    
Factoring Agreements [Member]      
Selling, General and Administrative Expense 353,000 287,000  
Long-Term Debt $ 0 $ 0