Quarterly report pursuant to Section 13 or 15(d)

Note 6 - Stock-based Compensation - Compensation Expense Associated with Non-vested Stock Grants (Details)

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Note 6 - Stock-based Compensation - Compensation Expense Associated with Non-vested Stock Grants (Details) - USD ($)
3 Months Ended 9 Months Ended
Dec. 30, 2018
Dec. 31, 2017
Dec. 30, 2018
Dec. 31, 2017
Allocated share-based compensation $ 84,000 $ 129,000 $ 281,000 $ 406,000
Selling, General and Administrative Expenses [Member] | Non-vested Stock Grants [Member]        
Allocated share-based compensation 68,000 110,000 224,000 344,000
Selling, General and Administrative Expenses [Member] | Non-vested Stock Grants [Member] | Employee [Member]        
Allocated share-based compensation 29,000 56,000 87,000 168,000
Selling, General and Administrative Expenses [Member] | Non-vested Stock Grants [Member] | Non Employee Directors [Member]        
Allocated share-based compensation 39,000 54,000 137,000 176,000
Selling, General and Administrative Expenses [Member] | Non-vested Stock Grants [Member] | Fiscal Year 2017 [Member]        
Allocated share-based compensation   62,000 47,000 187,000
Selling, General and Administrative Expenses [Member] | Non-vested Stock Grants [Member] | Fiscal Year 2017 [Member] | Employee [Member]        
Allocated share-based compensation   27,000 81,000
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 47,000 106,000
Selling, General and Administrative Expenses [Member] | Non-vested Stock Grants [Member] | Fiscal Year 2016 [Member]        
Allocated share-based compensation       38,000
Selling, General and Administrative Expenses [Member] | Non-vested Stock Grants [Member] | Fiscal Year 2016 [Member] | Employee [Member]        
Allocated share-based compensation      
Selling, General and Administrative Expenses [Member] | Non-vested Stock Grants [Member] | Fiscal Year 2016 [Member] | Non Employee Directors [Member]        
Allocated share-based compensation       38,000
Selling, General and Administrative Expenses [Member] | Non-vested Stock Grants [Member] | Fiscal Year 2018 [Member]        
Allocated share-based compensation 48,000 48,000 145,000 119,000
Selling, General and Administrative Expenses [Member] | Non-vested Stock Grants [Member] | Fiscal Year 2018 [Member] | Employee [Member]        
Allocated share-based compensation 29,000 29,000 87,000 87,000
Selling, General and Administrative Expenses [Member] | Non-vested Stock Grants [Member] | Fiscal Year 2018 [Member] | Non Employee Directors [Member]        
Allocated share-based compensation 19,000 $ 19,000 58,000 $ 32,000
Selling, General and Administrative Expenses [Member] | Non-vested Stock Grants [Member] | Fiscal Year 2019 [Member]        
Allocated share-based compensation 20,000   32,000  
Selling, General and Administrative Expenses [Member] | Non-vested Stock Grants [Member] | Fiscal Year 2019 [Member] | Employee [Member]        
Allocated share-based compensation    
Selling, General and Administrative Expenses [Member] | Non-vested Stock Grants [Member] | Fiscal Year 2019 [Member] | Non Employee Directors [Member]        
Allocated share-based compensation $ 20,000   $ 32,000