Annual report pursuant to Section 13 and 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 ($)
 12 Months Ended
Apr. 02, 2017
Apr. 03, 2016
Allocated Share-based Compensation Expense $ 604,000 $ 906,000
Selling, General and Administrative Expenses [Member] | Non-vested Stock Grants [Member]    
Allocated Share-based Compensation Expense 494,000 762,000
Selling, General and Administrative Expenses [Member] | Non-vested Stock Grants [Member] | Employee [Member]    
Allocated Share-based Compensation Expense 248,000 543,000
Selling, General and Administrative Expenses [Member] | Non-vested Stock Grants [Member] | Non Employee Directors [Member]    
Allocated Share-based Compensation Expense 246,000 219,000
Selling, General and Administrative Expenses [Member] | Non-vested Stock Grants [Member] | Fiscal Year 2011 [Member]    
Allocated Share-based Compensation Expense   49,000
Selling, General and Administrative Expenses [Member] | Non-vested Stock Grants [Member] | Fiscal Year 2011 [Member] | Employee [Member]    
Allocated Share-based Compensation Expense   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  
Selling, General and Administrative Expenses [Member] | Non-vested Stock Grants [Member] | Fiscal Year 2015 [Member]    
Allocated Share-based Compensation Expense 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   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 37,000 112,000
Selling, General and Administrative Expenses [Member] | Non-vested Stock Grants [Member] | Fiscal Year 2016 [Member]    
Allocated Share-based Compensation Expense 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 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 115,000 76,000
Selling, General and Administrative Expenses [Member] | Non-vested Stock Grants [Member] | Fiscal Year 2014 [Member]    
Allocated Share-based Compensation Expense   31,000
Selling, General and Administrative Expenses [Member] | Non-vested Stock Grants [Member] | Fiscal Year 2014 [Member] | Employee [Member]    
Allocated Share-based Compensation Expense  
Selling, General and Administrative Expenses [Member] | Non-vested Stock Grants [Member] | Fiscal Year 2014 [Member] | Non Employee Directors [Member]    
Allocated Share-based Compensation Expense   $ 31,000
Selling, General and Administrative Expenses [Member] | Non-vested Stock Grants [Member] | Fiscal Year 2017 [Member]    
Allocated Share-based Compensation Expense 202,000  
Selling, General and Administrative Expenses [Member] | Non-vested Stock Grants [Member] | Fiscal Year 2017 [Member] | Employee [Member]    
Allocated Share-based Compensation Expense 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 $ 94,000