Annual report pursuant to Section 13 and 15(d)

Note 8 - Stock-based Compensation (Details Textual)

v3.8.0.1
Note 8 - Stock-based Compensation (Details Textual) - USD ($)
1 Months Ended 3 Months Ended 12 Months Ended 61 Months Ended
Jul. 29, 2015
Aug. 31, 2017
Aug. 31, 2016
Aug. 31, 2015
Jun. 27, 2010
Apr. 01, 2018
Apr. 02, 2017
Apr. 03, 2016
Jul. 28, 2015
Common Stock, Capital Shares Reserved for Future Issuance           672,000      
Allocated Share-based Compensation Expense, Total           $ 539,000 $ 604,000 $ 906,000  
Employee Service Share-based Compensation, Allocation of Recognized Period Costs, Capitalized Amount           0      
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value           22,000 214,000 300,000  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value           15,000      
Proceeds from Stock Options Exercised           $ 0 0 0  
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition           171 days      
Share-based Compensation Arrangement by Share-based Payment Award, Accelerated Vesting, Number                 105,000
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Total           $ 266,000      
Employee Stock Option [Member]                  
Allocated Share-based Compensation Expense, Total           $ 84,000 110,000 144,000  
Payments Related to Tax Withholding for Share-based Compensation             $ 75,000 $ 118,000  
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period           2 years 2 years 2 years  
Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Stock Options           $ 75,000      
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition           219 days      
Restricted Stock [Member] | Non Employee Directors [Member]                  
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period           2 years      
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period   28,000 28,000 28,000          
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value   $ 157,000 $ 281,000 $ 226,000          
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period         345,000        
Share Base Compensation Arrangement by Share Based Payment Award Equity Instrument Other Than Options Grants in Period Total Grant Date Fair Value         $ 1,200,000        
Restricted Stock [Member] | Employee [Member]                  
Payments Related to Tax Withholding for Share-based Compensation $ 948,000                
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period 240,000                
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Aggregate Intrinsic Value, Vested $ 1,900,000                
Performance Shares [Member]                  
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period           2 years      
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition           3 years