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. 31, 2019
Apr. 01, 2018
Allocated share-based compensation $ 377,000 $ 539,000
Selling, General and Administrative Expenses [Member] | Non-vested Stock Grants [Member]    
Allocated share-based compensation 304,000 455,000
Selling, General and Administrative Expenses [Member] | Non-vested Stock Grants [Member] | Fiscal Year 2017 [Member]    
Allocated share-based compensation 47,000 249,000
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 2018 [Member]    
Allocated share-based compensation 193,000 168,000
Selling, General and Administrative Expenses [Member] | Non-vested Stock Grants [Member] | Fiscal Year 2019 [Member]    
Allocated share-based compensation 64,000  
Selling, General and Administrative Expenses [Member] | Non-vested Stock Grants [Member] | Non Employee Directors [Member]    
Allocated share-based compensation 175,000 231,000
Selling, General and Administrative Expenses [Member] | Non-vested Stock Grants [Member] | Non Employee Directors [Member] | Fiscal Year 2017 [Member]    
Allocated share-based compensation 47,000 141,000
Selling, General and Administrative Expenses [Member] | Non-vested Stock Grants [Member] | Non Employee Directors [Member] | Fiscal Year 2016 [Member]    
Allocated share-based compensation   38,000
Selling, General and Administrative Expenses [Member] | Non-vested Stock Grants [Member] | Non Employee Directors [Member] | Fiscal Year 2018 [Member]    
Allocated share-based compensation 77,000 52,000
Selling, General and Administrative Expenses [Member] | Non-vested Stock Grants [Member] | Non Employee Directors [Member] | Fiscal Year 2019 [Member]    
Allocated share-based compensation 51,000  
Selling, General and Administrative Expenses [Member] | Non-vested Stock Grants [Member] | Employee [Member]    
Allocated share-based compensation 129,000 224,000
Selling, General and Administrative Expenses [Member] | Non-vested Stock Grants [Member] | Employee [Member] | Fiscal Year 2017 [Member]    
Allocated share-based compensation   108,000
Selling, General and Administrative Expenses [Member] | Non-vested Stock Grants [Member] | Employee [Member] | Fiscal Year 2018 [Member]    
Allocated share-based compensation 116,000 $ 116,000
Selling, General and Administrative Expenses [Member] | Non-vested Stock Grants [Member] | Employee [Member] | Fiscal Year 2019 [Member]    
Allocated share-based compensation $ 13,000