Quarterly report pursuant to Section 13 or 15(d)

Note 6 - Stock-based Compensation - Grants and Compensation Expense in Connection With the Performance Bonus Plan (Details)

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Note 6 - Stock-based Compensation - Grants and Compensation Expense in Connection With the Performance Bonus Plan (Details) - USD ($)
3 Months Ended 12 Months Ended
Jul. 01, 2018
Jul. 02, 2017
Apr. 01, 2018
Apr. 02, 2017
Apr. 03, 2016
Allocated share-based compensation $ 110,000 $ 142,000      
Shares Vested (in shares) 41,726 20,604      
Shares Vested, Aggregate Value $ 246,000 $ 167,000      
Shares Vested, Taxes Remitted $ 95,000 $ 56,000      
Performance Shares [Member] | Earned in Fiscal Year 2016, Granted in Fiscal Year 2017 [Member]          
Grant Date (in shares) 41,205        
Fair Value Per Share (in dollars per share) $ 7.865        
Allocated share-based compensation   $ 108,000 $ 108,000 $ 108,000
Shares Vested (in shares) 20,601 20,604      
Shares Vested, Aggregate Value $ 122,000 $ 167,000      
Shares Vested, Taxes Remitted $ 39,000 $ 56,000      
Performance Shares [Member] | Earned in Fiscal Year 2017, Granted in Fiscal Year 2018 [Member]          
Grant Date (in shares) 42,250        
Fair Value Per Share (in dollars per share) $ 8.271        
Allocated share-based compensation $ 116,000   $ 116,000 $ 116,000
Shares Vested (in shares) 21,125      
Shares Vested, Aggregate Value $ 124,000      
Shares Vested, Taxes Remitted $ 56,000