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 6 Months Ended
Sep. 27, 2020
Sep. 29, 2019
Sep. 27, 2020
Sep. 29, 2019
Allocated share-based compensation $ 100,000 $ 75,000 $ 186,000 $ 140,000
Selling, General and Administrative Expenses [Member] | Non-vested Stock Grants [Member]        
Allocated share-based compensation 87,000 64,000 158,000 120,000
Selling, General and Administrative Expenses [Member] | Non-vested Stock Grants [Member] | Fiscal Year 2018 [Member]        
Allocated share-based compensation 7,000 26,000
Selling, General and Administrative Expenses [Member] | Non-vested Stock Grants [Member] | Fiscal Year 2019 [Member]        
Allocated share-based compensation 25,000 37,000 62,000 74,000
Selling, General and Administrative Expenses [Member] | Non-vested Stock Grants [Member] | Fiscal Year 2020 [Member]        
Allocated share-based compensation 30,000 20,000 60,000 20,000
Selling, General and Administrative Expenses [Member] | Non-vested Stock Grants [Member] | Fiscal Year 2021 [Member]        
Allocated share-based compensation 32,000 36,000
Selling, General and Administrative Expenses [Member] | Employee [Member] | Non-vested Stock Grants [Member]        
Allocated share-based compensation 31,000 18,000 53,000 36,000
Selling, General and Administrative Expenses [Member] | Employee [Member] | Non-vested Stock Grants [Member] | Fiscal Year 2018 [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 18,000 37,000 36,000
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] | Employee [Member] | Non-vested Stock Grants [Member] | Fiscal Year 2021 [Member]        
Allocated share-based compensation 12,000 16,000
Selling, General and Administrative Expenses [Member] | Non Employee Directors [Member] | Non-vested Stock Grants [Member]        
Allocated share-based compensation 56,000 46,000 105,000 84,000
Selling, General and Administrative Expenses [Member] | Non Employee Directors [Member] | Non-vested Stock Grants [Member] | Fiscal Year 2018 [Member]        
Allocated share-based compensation 7,000 26,000
Selling, General and Administrative Expenses [Member] | Non Employee Directors [Member] | Non-vested Stock Grants [Member] | Fiscal Year 2019 [Member]        
Allocated share-based compensation 6,000 19,000 25,000 38,000
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 20,000 60,000 20,000
Selling, General and Administrative Expenses [Member] | Non Employee Directors [Member] | Non-vested Stock Grants [Member] | Fiscal Year 2021 [Member]        
Allocated share-based compensation $ 20,000 $ 20,000