Quarterly report pursuant to Section 13 or 15(d)

Note 5 - Financing Arrangements (Details Textual)

v3.10.0.1
Note 5 - Financing Arrangements (Details Textual) - USD ($)
3 Months Ended
Aug. 01, 2018
Sep. 19, 2017
May 16, 2017
Jul. 01, 2018
Jul. 02, 2017
Apr. 01, 2018
Sep. 18, 2017
Selling, General and Administrative Expense, Total       $ 3,685,000 $ 2,901,000    
Line of Credit Facility, Remaining Borrowing Capacity       17,900,000   $ 13,200,000  
Revolving Credit Facility [Member]              
Line of Credit Facility, Maximum Borrowing Capacity       26,000,000      
Long-term Line of Credit, Total       3,800,000   9,500,000  
Letters of Credit Outstanding, Amount       $ 0   $ 0  
Revolving Credit Facility [Member] | Prime Rate [Member]              
Debt Instrument Basis Spread Below Variable Rate       0.50%      
Revolving Credit Facility [Member] | London Interbank Offered Rate (LIBOR) [Member]              
Debt Instrument, Basis Spread on Variable Rate       2.00%      
Debt Instrument, Interest Rate, Effective Percentage       4.00%      
Revolving Credit Facility [Member] | London Interbank Offered Rate (LIBOR) [Member] | Subsequent Event [Member]              
Debt Instrument, Basis Spread on Variable Rate 1.75%            
Letter of Credit [Member]              
Line of Credit Facility, Maximum Borrowing Capacity       $ 1,500,000      
Factoring Fees [Member]              
Selling, General and Administrative Expense, Total       56,000 $ 65,000    
Chase Bank N.A. [Member] | Master Stand-by Claims Purchase Agreement [Member]              
Purchase Agreement, Monthly Fee, Percentage of Accounts Receivable     1.65%        
Purchase Agreement, Limit of Accounts Receivable Used in Determination of Monthly Fee     $ 1,800,000        
Selling, General and Administrative Expense, Total       64,000      
Chase Bank N.A. [Member] | Master Stand-by Claims Purchase Agreement [Member] | Other Accounts Receivable [Member]              
Accounts Receivable, Net, Total       $ 746,000     $ 866,000
Chase Bank N.A. [Member] | Master Stand by Claims Second Purchase Agreement [Member]              
Purchase Agreement, Monthly Fee, Percentage of Accounts Receivable   1.50%          
Purchase Agreement, Limit of Accounts Receivable Used in Determination of Monthly Fee   $ 1,800,000