Annual report pursuant to Section 13 and 15(d)

Note 8 - Stock-based Compensation - Compensation Expense Associated with Non-vested Stock Grants (Details)

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Note 8 - Stock-based Compensation - Compensation Expense Associated with Non-vested Stock Grants (Details) - USD ($)
12 Months Ended
Mar. 29, 2020
Mar. 31, 2019
Allocated share-based compensation $ 297,000 $ 377,000
Selling, General and Administrative Expenses [Member] | Non-vested Stock Grants [Member]    
Allocated share-based compensation 255,000 304,000
Selling, General and Administrative Expenses [Member] | Non-vested Stock Grants [Member] | Fiscal Year 2018 [Member]    
Allocated share-based compensation 26,000 193,000
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 149,000 64,000
Selling, General and Administrative Expenses [Member] | Non-vested Stock Grants [Member] | Fiscal Year 2020 [Member]    
Allocated share-based compensation 80,000  
Selling, General and Administrative Expenses [Member] | Employee [Member] | Non-vested Stock Grants [Member]    
Allocated share-based compensation 73,000 129,000
Selling, General and Administrative Expenses [Member] | Employee [Member] | Non-vested Stock Grants [Member] | Fiscal Year 2018 [Member]    
Allocated share-based compensation 116,000
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 73,000 13,000
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 182,000 175,000
Selling, General and Administrative Expenses [Member] | Non Employee Directors [Member] | Non-vested Stock Grants [Member] | Fiscal Year 2018 [Member]    
Allocated share-based compensation 26,000 77,000
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 76,000 $ 51,000
Selling, General and Administrative Expenses [Member] | Non Employee Directors [Member] | Non-vested Stock Grants [Member] | Fiscal Year 2020 [Member]    
Allocated share-based compensation $ 80,000