Quarterly report pursuant to Section 13 or 15(d)

Note 7 - Stock-based Compensation - Compensation Expense Associated with Non-vested Stock Grants (Details)

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Note 7 - Stock-based Compensation - Compensation Expense Associated with Non-vested Stock Grants (Details) - USD ($)
3 Months Ended 9 Months Ended
Dec. 29, 2019
Dec. 30, 2018
Dec. 29, 2019
Dec. 30, 2018
Allocated share-based compensation $ 79,000 $ 84,000 $ 219,000 $ 281,000
Selling, General and Administrative Expenses [Member] | Non-vested Stock Grants [Member]        
Allocated share-based compensation 68,000 68,000 188,000 224,000
Selling, General and Administrative Expenses [Member] | Non-vested Stock Grants [Member] | Fiscal Year 2018 [Member]        
Allocated share-based compensation 48,000 26,000 145,000
Selling, General and Administrative Expenses [Member] | Non-vested Stock Grants [Member] | Fiscal Year 2017 [Member]        
Allocated share-based compensation     47,000
Selling, General and Administrative Expenses [Member] | Non-vested Stock Grants [Member] | Fiscal Year 2019 [Member]        
Allocated share-based compensation 38,000 20,000 112,000 32,000
Selling, General and Administrative Expenses [Member] | Non-vested Stock Grants [Member] | Fiscal Year 2020 [Member]        
Allocated share-based compensation 30,000 50,000
Selling, General and Administrative Expenses [Member] | Employee [Member] | Non-vested Stock Grants [Member]        
Allocated share-based compensation 19,000 29,000 55,000 87,000
Selling, General and Administrative Expenses [Member] | Employee [Member] | Non-vested Stock Grants [Member] | Fiscal Year 2018 [Member]        
Allocated share-based compensation 29,000 87,000
Selling, General and Administrative Expenses [Member] | Employee [Member] | Non-vested Stock Grants [Member] | Fiscal Year 2017 [Member]        
Allocated share-based compensation    
Selling, General and Administrative Expenses [Member] | Employee [Member] | Non-vested Stock Grants [Member] | Fiscal Year 2019 [Member]        
Allocated share-based compensation 19,000 55,000
Selling, General and Administrative Expenses [Member] | Employee [Member] | Non-vested Stock Grants [Member] | Fiscal Year 2020 [Member]        
Allocated share-based compensation
Selling, General and Administrative Expenses [Member] | Non Employee Directors [Member] | Non-vested Stock Grants [Member]        
Allocated share-based compensation 49,000 39,000 133,000 137,000
Selling, General and Administrative Expenses [Member] | Non Employee Directors [Member] | Non-vested Stock Grants [Member] | Fiscal Year 2018 [Member]        
Allocated share-based compensation 19,000 26,000 58,000
Selling, General and Administrative Expenses [Member] | Non Employee Directors [Member] | Non-vested Stock Grants [Member] | Fiscal Year 2017 [Member]        
Allocated share-based compensation     47,000
Selling, General and Administrative Expenses [Member] | Non Employee Directors [Member] | Non-vested Stock Grants [Member] | Fiscal Year 2019 [Member]        
Allocated share-based compensation 19,000 20,000 57,000 32,000
Selling, General and Administrative Expenses [Member] | Non Employee Directors [Member] | Non-vested Stock Grants [Member] | Fiscal Year 2020 [Member]        
Allocated share-based compensation $ 30,000 $ 50,000