Annual report pursuant to Section 13 and 15(d)

Note 7 - Stock-based Compensation - Grants and Compensation Expense in Connection with the Performance Bonus Plan (Details)

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Note 7 - Stock-based Compensation - Grants and Compensation Expense in Connection with the Performance Bonus Plan (Details) - USD ($)
12 Months Ended
Apr. 01, 2018
Apr. 02, 2017
Apr. 03, 2016
Mar. 29, 2015
Mar. 30, 2014
Allocated Share Based Compensation Expense   $ 604,000 $ 906,000    
Performance Shares [Member] | Earned in Fiscal 2014, Granted in Fiscal 2015 [Member]          
Fair Value Per Share (in dollars per share)       $ 5.65  
Allocated Share Based Compensation Expense   $ 354,000 $ 354,000 $ 354,000
Number of Shares (in shares)       188,232  
Shares Vested (in shares)   188,532    
Shares Vested, Aggregate Value   $ 1,618,000    
Shares Vested, Taxes Remitted   $ 789,000    
Performance Shares [Member] | Earned in Fiscal 2014, Granted in Fiscal 2015 [Member] | Scenario, Forecast [Member]          
Allocated Share Based Compensation Expense        
Performance Shares [Member] | Earned in Fiscal Year 2015, Granted in Fiscal Year 2016 [Member]          
Fair Value Per Share (in dollars per share)     $ 7.18    
Allocated Share Based Compensation Expense   $ 140,000 $ 140,000 $ 140,000  
Number of Shares (in shares)     58,532    
Shares Vested (in shares)   29,265 29,267    
Shares Vested, Aggregate Value   $ 240,000 $ 275,000    
Shares Vested, Taxes Remitted   $ 86,000 138,000    
Performance Shares [Member] | Earned in Fiscal Year 2015, Granted in Fiscal Year 2016 [Member] | Scenario, Forecast [Member]          
Allocated Share Based Compensation Expense        
Performance Shares [Member] | Earned in Fiscal Year 2016, Granted in Fiscal Year 2017 [Member]          
Fair Value Per Share (in dollars per share)   $ 7.865      
Allocated Share Based Compensation Expense   $ 108,000 $ 108,000    
Number of Shares (in shares)   41,205      
Performance Shares [Member] | Earned in Fiscal Year 2016, Granted in Fiscal Year 2017 [Member] | Scenario, Forecast [Member]          
Allocated Share Based Compensation Expense $ 108,000