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 9 Months Ended 12 Months Ended
Dec. 30, 2018
Dec. 31, 2017
Dec. 30, 2018
Dec. 31, 2017
Mar. 31, 2019
Apr. 01, 2018
Apr. 02, 2017
Apr. 03, 2016
Allocated share-based compensation $ 84,000 $ 129,000 $ 281,000 $ 406,000        
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]                
Number of Shares (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]                
Number of Shares (in shares)     42,250          
Fair Value Per Share (in dollars per share)     $ 8.271          
Allocated share-based compensation           $ 116,000 $ 116,000
Shares Vested (in shares)     21,125        
Shares Vested, Aggregate Value     $ 124,000        
Shares Vested, Taxes Remitted     $ 56,000        
Performance Shares [Member] | Earned in Fiscal Year 2017, Granted in Fiscal Year 2018 [Member] | Scenario, Forecast [Member]                
Allocated share-based compensation         $ 116,000