Quarterly report pursuant to Section 13 or 15(d)

Note 5 - Stock-based Compensation - Grants and Compensation Expense in Connection with the Performance Bonus Plan (Details)

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Note 5 - Stock-based Compensation - Grants and Compensation Expense in Connection with the Performance Bonus Plan (Details) - USD ($)
3 Months Ended 12 Months Ended
Jul. 02, 2017
Jul. 03, 2016
Mar. 31, 2019
Apr. 01, 2018
Apr. 02, 2017
Apr. 03, 2016
Mar. 29, 2015
Allocated share-based compensation $ 142,000 $ 161,000          
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         $ 140,000 $ 140,000 $ 140,000
Number of Shares (in shares)           58,532  
Performance Shares [Member] | Earned in Fiscal Year 2016, Granted in Fiscal Year 2017 [Member]              
Shares Vested, Taxes Remitted $ 56,000          
Fair Value Per Share (in dollars per share)         $ 7.865    
Allocated share-based compensation         $ 108,000 $ 108,000  
Number of Shares (in shares)         41,205 41,205  
Shares Vested (in shares) 20,604          
Shares Vested, Aggregate Value $ 167,000          
Performance Shares [Member] | Earned in Fiscal Year 2016, Granted in Fiscal Year 2017 [Member] | Scenario, Forecast [Member]              
Allocated share-based compensation       $ 108,000      
Performance Shares [Member] | Earned in Fiscal Year 2017, Granted in Fiscal Year 2018 [Member]              
Fair Value Per Share (in dollars per share)       $ 8.271      
Allocated share-based compensation         $ 116,000    
Number of Shares (in shares)       42,250      
Performance Shares [Member] | Earned in Fiscal Year 2017, Granted in Fiscal Year 2018 [Member] | Scenario, Forecast [Member]              
Allocated share-based compensation     $ 116,000 $ 116,000