Quarterly report pursuant to Section 13 or 15(d)

Note 5 - Stock-based Compensation - Compensaiton Expense Associated with Non-vested Stock Grants (Details)

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Note 5 - Stock-based Compensation - Compensaiton Expense Associated with Non-vested Stock Grants (Details) - USD ($)
 3 Months Ended 9 Months Ended
Jan. 01, 2017
Dec. 27, 2015
Jan. 01, 2017
Dec. 27, 2015
Allocated Share-based Compensation Expense $ 149,000 $ 212,000 $ 456,000 $ 691,000
Selling, General and Administrative Expenses [Member] | Non-vested Stock Grants [Member]        
Allocated Share-based Compensation Expense 126,000 181,000 368,000 583,000
Selling, General and Administrative Expenses [Member] | Non-vested Stock Grants [Member] | Employee [Member]        
Allocated Share-based Compensation Expense 62,000 124,000 186,000 420,000
Selling, General and Administrative Expenses [Member] | Non-vested Stock Grants [Member] | Non Employee Directors [Member]        
Allocated Share-based Compensation Expense 64,000 57,000 182,000 163,000
Selling, General and Administrative Expenses [Member] | Non-vested Stock Grants [Member] | Fiscal Year 2011 [Member]        
Allocated Share-based Compensation Expense     48,000
Selling, General and Administrative Expenses [Member] | Non-vested Stock Grants [Member] | Fiscal Year 2011 [Member] | Employee [Member]        
Allocated Share-based Compensation Expense     48,000
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 117,000 37,000 351,000
Selling, General and Administrative Expenses [Member] | Non-vested Stock Grants [Member] | Fiscal Year 2015 [Member] | Employee [Member]        
Allocated Share-based Compensation Expense   89,000 267,000
Selling, General and Administrative Expenses [Member] | Non-vested Stock Grants [Member] | Fiscal Year 2015 [Member] | Non Employee Directors [Member]        
Allocated Share-based Compensation Expense 28,000 37,000 84,000
Selling, General and Administrative Expenses [Member] | Non-vested Stock Grants [Member] | Fiscal Year 2016 [Member]        
Allocated Share-based Compensation Expense 64,000 64,000 191,000 153,000
Selling, General and Administrative Expenses [Member] | Non-vested Stock Grants [Member] | Fiscal Year 2016 [Member] | Employee [Member]        
Allocated Share-based Compensation Expense 35,000 35,000 105,000 105,000
Selling, General and Administrative Expenses [Member] | Non-vested Stock Grants [Member] | Fiscal Year 2016 [Member] | Non Employee Directors [Member]        
Allocated Share-based Compensation Expense 29,000 $ 29,000 86,000 48,000
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 62,000   140,000
Selling, General and Administrative Expenses [Member] | Non-vested Stock Grants [Member] | Fiscal Year 2017 [Member] | Employee [Member]        
Allocated Share-based Compensation Expense 27,000   81,000
Selling, General and Administrative Expenses [Member] | Non-vested Stock Grants [Member] | Fiscal Year 2017 [Member] | Non Employee Directors [Member]        
Allocated Share-based Compensation Expense $ 35,000   $ 59,000