Quarterly report pursuant to Section 13 or 15(d)

Note 5 - Stock-based Compensation - Compensation Expense Associated with Non-vested Stock Grants (Details)

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Note 5 - Stock-based Compensation - Compensation Expense Associated with Non-vested Stock Grants (Details) - USD ($)
3 Months Ended
Jul. 02, 2017
Jul. 03, 2016
Allocated share-based compensation $ 142,000 $ 161,000
Selling, General and Administrative Expenses [Member] | Non-vested Stock Grants [Member]    
Allocated share-based compensation 120,000 119,000
Selling, General and Administrative Expenses [Member] | Non-vested Stock Grants [Member] | Employee [Member]    
Allocated share-based compensation 56,000 62,000
Selling, General and Administrative Expenses [Member] | Non-vested Stock Grants [Member] | Non Employee Directors [Member]    
Allocated share-based compensation 64,000 57,000
Selling, General and Administrative Expenses [Member] | Non-vested Stock Grants [Member] | Fiscal Year 2015 [Member]    
Allocated share-based compensation 28,000
Selling, General and Administrative Expenses [Member] | Non-vested Stock Grants [Member] | Fiscal Year 2015 [Member] | Employee [Member]    
Allocated share-based compensation
Selling, General and Administrative Expenses [Member] | Non-vested Stock Grants [Member] | Fiscal Year 2015 [Member] | Non Employee Directors [Member]    
Allocated share-based compensation 28,000
Selling, General and Administrative Expenses [Member] | Non-vested Stock Grants [Member] | Fiscal Year 2016 [Member]    
Allocated share-based compensation 29,000 64,000
Selling, General and Administrative Expenses [Member] | Non-vested Stock Grants [Member] | Fiscal Year 2016 [Member] | Employee [Member]    
Allocated share-based compensation 35,000
Selling, General and Administrative Expenses [Member] | Non-vested Stock Grants [Member] | Fiscal Year 2016 [Member] | Non Employee Directors [Member]    
Allocated share-based compensation 29,000 29,000
Selling, General and Administrative Expenses [Member] | Non-vested Stock Grants [Member] | Fiscal Year 2017 [Member]    
Allocated share-based compensation 62,000 27,000
Selling, General and Administrative Expenses [Member] | Non-vested Stock Grants [Member] | Fiscal Year 2017 [Member] | Employee [Member]    
Allocated share-based compensation 27,000 27,000
Selling, General and Administrative Expenses [Member] | Non-vested Stock Grants [Member] | Fiscal Year 2017 [Member] | Non Employee Directors [Member]    
Allocated share-based compensation 35,000
Selling, General and Administrative Expenses [Member] | Non-vested Stock Grants [Member] | Fiscal Year 2018 [Member]    
Allocated share-based compensation 29,000
Selling, General and Administrative Expenses [Member] | Non-vested Stock Grants [Member] | Fiscal Year 2018 [Member] | Employee [Member]    
Allocated share-based compensation 29,000
Selling, General and Administrative Expenses [Member] | Non-vested Stock Grants [Member] | Fiscal Year 2018 [Member] | Non Employee Directors [Member]    
Allocated share-based compensation