Quarterly report pursuant to Section 13 or 15(d)

Note 2 - Financing Arrangements (Details Textual)

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Note 2 - Financing Arrangements (Details Textual) - USD ($)
3 Months Ended 9 Months Ended
Dec. 29, 2019
Dec. 30, 2018
Dec. 29, 2019
Dec. 30, 2018
Mar. 31, 2019
Selling, General and Administrative Expense, Total $ 3,416,000 $ 3,446,000 $ 10,344,000 $ 10,958,000  
Line of Credit Facility, Remaining Borrowing Capacity 23,700,000   23,700,000   $ 19,400,000
Revolving Credit Facility [Member]          
Line of Credit Facility, Maximum Borrowing Capacity 26,000,000   26,000,000    
Long-term Line of Credit, Total 0   0   4,500,000
Letters of Credit Outstanding, Amount $ 0   $ 0   $ 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 2.75%   2.75%    
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 3.44%   3.44%    
Letter of Credit [Member]          
Line of Credit Facility, Maximum Borrowing Capacity $ 1,500,000   $ 1,500,000    
Factoring Fees [Member]          
Selling, General and Administrative Expense, Total $ 75,000 $ 64,000 $ 188,000 $ 192,000