Annual report pursuant to Section 13 and 15(d)

Note 15 - Share-based Compensation and Employee Benefit Plans (Details Textual)

v3.7.0.1
Note 15 - Share-based Compensation and Employee Benefit Plans (Details Textual) - USD ($)
12 Months Ended
Mar. 25, 2017
Mar. 26, 2016
Mar. 28, 2015
Proceeds from Stock Options Exercised $ 77,000  
Defined Contribution Plan, Maximum Annual Contributions Per Employee, Percent 100.00%    
Defined Contribution Plan, Vesting Period 4 years    
Defined Contribution Plan, Employer Discretionary Contribution Amount $ 33,000 $ 41,000  
Employee Stock Option [Member]      
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant 1,285,127    
Employee Stock Option [Member] | Minimum [Member]      
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period 4 years    
Employee Stock Option [Member] | Maximum [Member]      
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period 5 years    
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period 10 years    
Stock Appreciation Rights (SARs) [Member]      
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period 0    
Restricted Stock [Member]      
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period 44,500 0 432,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested in Period, Fair Value $ 29,000 $ 761,000  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value   $ 2.11  
Allocated Share-based Compensation Expense $ 29,000 $ 522,000  
2000 Stock Option Plan and 2005 Equity Incentive Plan [Member]      
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized 2,850,000    
Percent Of Fair Market Value Of Common Stock At Date Of Grant 100.00%    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value $ 0.83 $ 1.04  
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized $ 180,000    
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition 3 years 36 days    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested, Number of Shares 272,500 419,050  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested in Period, Fair Value $ 315,000 $ 104,000  
Proceeds from Stock Options Exercised 0 77,000  
Allocated Share-based Compensation Expense $ 257,000 $ 403,000