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Note 5 - Stock-based Compensation (Details Textual) - USD ($)
1 Months Ended 3 Months Ended 12 Months Ended
Feb. 28, 2015
Mar. 01, 2015
Feb. 26, 2017
Feb. 28, 2016
Mar. 01, 2015
Percentage of Stock Options, Exercisable One Year From Date of Grant     25.00%    
Percentage of Stock Options Exercisable On Each Succeeding Year from Date of Grant     25.00%    
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period     10 years    
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized     1,800,000    
Common Stock, Capital Shares Reserved for Future Issuance     1,466,030    
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant     395,501    
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized     $ 1,852,000    
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition     2 years 7 days    
Share-based Compensation Arrangement by Share-based Payment Award, Plan Modification, Price Reduction   $ 1.50      
Common Stock, Dividends, Per Share, Cash Paid $ 1.50        
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value     $ 0 $ 4,000 $ 688,000
Selling, General and Administrative Expenses [Member]          
Share-based Compensation Arrangement by Share-based Payment Award, Plan Modification, Incremental Compensation Cost     $ 47,000 $ 131,000