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
Apr. 01, 2018
Apr. 02, 2017
Apr. 03, 2016
Allocated Share-based Compensation Expense, Total $ 539,000 $ 604,000 $ 906,000
Selling, General and Administrative Expenses [Member] | Non-vested Stock Grants [Member]      
Allocated Share-based Compensation Expense, Total 455,000 494,000 762,000
Selling, General and Administrative Expenses [Member] | Non-vested Stock Grants [Member] | Employee [Member]      
Allocated Share-based Compensation Expense, Total 224,000 248,000 543,000
Selling, General and Administrative Expenses [Member] | Non-vested Stock Grants [Member] | Non Employee Directors [Member]      
Allocated Share-based Compensation Expense, Total 231,000 246,000 219,000
Selling, General and Administrative Expenses [Member] | Non-vested Stock Grants [Member] | Fiscal Year 2016 [Member]      
Allocated Share-based Compensation Expense, Total 38,000 255,000 216,000
Selling, General and Administrative Expenses [Member] | Non-vested Stock Grants [Member] | Fiscal Year 2016 [Member] | Employee [Member]      
Allocated Share-based Compensation Expense, Total 140,000 140,000
Selling, General and Administrative Expenses [Member] | Non-vested Stock Grants [Member] | Fiscal Year 2016 [Member] | Non Employee Directors [Member]      
Allocated Share-based Compensation Expense, Total 38,000 115,000 76,000
Selling, General and Administrative Expenses [Member] | Non-vested Stock Grants [Member] | Fiscal Year 2015 [Member]      
Allocated Share-based Compensation Expense, Total   37,000 466,000
Selling, General and Administrative Expenses [Member] | Non-vested Stock Grants [Member] | Fiscal Year 2015 [Member] | Employee [Member]      
Allocated Share-based Compensation Expense, Total   354,000
Selling, General and Administrative Expenses [Member] | Non-vested Stock Grants [Member] | Fiscal Year 2015 [Member] | Non Employee Directors [Member]      
Allocated Share-based Compensation Expense, Total   37,000 112,000
Selling, General and Administrative Expenses [Member] | Non-vested Stock Grants [Member] | Fiscal Year 2011 [Member]      
Allocated Share-based Compensation Expense, Total     49,000
Selling, General and Administrative Expenses [Member] | Non-vested Stock Grants [Member] | Fiscal Year 2011 [Member] | Employee [Member]      
Allocated Share-based Compensation Expense, Total     49,000
Selling, General and Administrative Expenses [Member] | Non-vested Stock Grants [Member] | Fiscal Year 2011 [Member] | Non Employee Directors [Member]      
Allocated Share-based Compensation Expense, Total    
Selling, General and Administrative Expenses [Member] | Non-vested Stock Grants [Member] | Fiscal Year 2017 [Member]      
Allocated Share-based Compensation Expense, Total 249,000 202,000  
Selling, General and Administrative Expenses [Member] | Non-vested Stock Grants [Member] | Fiscal Year 2017 [Member] | Employee [Member]      
Allocated Share-based Compensation Expense, Total 108,000 108,000  
Selling, General and Administrative Expenses [Member] | Non-vested Stock Grants [Member] | Fiscal Year 2017 [Member] | Non Employee Directors [Member]      
Allocated Share-based Compensation Expense, Total 141,000 $ 94,000  
Selling, General and Administrative Expenses [Member] | Non-vested Stock Grants [Member] | Fiscal Year 2014 [Member]      
Allocated Share-based Compensation Expense, Total     31,000
Selling, General and Administrative Expenses [Member] | Non-vested Stock Grants [Member] | Fiscal Year 2014 [Member] | Employee [Member]      
Allocated Share-based Compensation Expense, Total    
Selling, General and Administrative Expenses [Member] | Non-vested Stock Grants [Member] | Fiscal Year 2014 [Member] | Non Employee Directors [Member]      
Allocated Share-based Compensation Expense, Total     $ 31,000
Selling, General and Administrative Expenses [Member] | Non-vested Stock Grants [Member] | Fiscal Year 2018 [Member]      
Allocated Share-based Compensation Expense, Total 168,000    
Selling, General and Administrative Expenses [Member] | Non-vested Stock Grants [Member] | Fiscal Year 2018 [Member] | Employee [Member]      
Allocated Share-based Compensation Expense, Total 116,000    
Selling, General and Administrative Expenses [Member] | Non-vested Stock Grants [Member] | Fiscal Year 2018 [Member] | Non Employee Directors [Member]      
Allocated Share-based Compensation Expense, Total $ 52,000