Annual report pursuant to Section 13 and 15(d)

Note 3 - Financing Arrangements (Details Textual)

v3.8.0.1
Note 3 - Financing Arrangements (Details Textual) - USD ($)
9 Months Ended 12 Months Ended
Sep. 19, 2017
May 16, 2017
Dec. 27, 2015
Apr. 01, 2018
Apr. 02, 2017
Apr. 03, 2016
Sep. 18, 2017
Selling, General and Administrative Expense, Total       $ 14,272,000 $ 10,711,000 $ 13,025,000  
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage     0.125%        
Line of Credit Facility, Commitment Fee Amount           25,000  
Line of Credit Facility, Remaining Borrowing Capacity       13,200,000 21,400,000    
Revolving Credit Facility [Member]              
Line of Credit Facility, Maximum Borrowing Capacity       26,000,000      
Long-term Line of Credit, Total       9,500,000 0    
Letters of Credit Outstanding, Amount       $ 0 0    
Revolving Credit Facility [Member] | Prime Rate [Member]              
Debt Instrument Basis Spread Below Variable Rate       0.50%      
Debt Instrument, Interest Rate, Effective Percentage       2.75%      
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       3.67%      
Letter of Credit [Member]              
Line of Credit Facility, Maximum Borrowing Capacity       $ 1,500,000      
Factoring Fees [Member]              
Selling, General and Administrative Expense, Total       223,000 $ 395,000 $ 556,000  
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       755,000     $ 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            
Selling, General and Administrative Expense, Total       $ 173,000