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 9 Months Ended
Sep. 19, 2017
May 16, 2017
Dec. 30, 2018
Dec. 31, 2017
Oct. 01, 2017
Dec. 30, 2018
Dec. 31, 2017
Oct. 01, 2017
Apr. 01, 2018
Sep. 18, 2017
Selling, General and Administrative Expense, Total     $ 3,446,000 $ 3,656,000   $ 10,958,000 $ 10,364,000      
Line of Credit Facility, Remaining Borrowing Capacity     20,900,000     20,900,000     $ 13,200,000  
Revolving Credit Facility [Member]                    
Line of Credit Facility, Maximum Borrowing Capacity     26,000,000     26,000,000        
Long-term Line of Credit, Total     1,900,000     1,900,000     9,500,000  
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%        
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     4.10%     4.10%        
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     $ 64,000 $ 49,000   $ 192,000 164,000      
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             $ 480,000      
Chase Bank N.A. [Member] | Master Stand-by Claims Purchase Agreement [Member] | Other Accounts Receivable [Member]                    
Accounts Receivable, Net, Total                   $ 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                  
Selling, General and Administrative Expense, Total         $ 81,000     $ 92,000