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Note 12 - Share-based Compensation (Details) - USD ($)
$ / shares in Units, $ in Millions
12 Months Ended
Apr. 05, 2010
Aug. 29, 2015
Aug. 30, 2014
Aug. 31, 2013
Note 12 - Share-based Compensation (Details) [Line Items]        
Share Price (in Dollars per share) $ 51.39      
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized (in Dollars)   $ 7.7    
Unrestricted Stock [Member]        
Note 12 - Share-based Compensation (Details) [Line Items]        
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period   1,096 583 1,590
Stock Appreciation Rights (SARs) [Member] | The 2010 Plan [Member]        
Note 12 - Share-based Compensation (Details) [Line Items]        
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period   4,875 4,700 6,570
Performance Restriced Shares [Member] | Chief Executive Officer [Member]        
Note 12 - Share-based Compensation (Details) [Line Items]        
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period 350,000      
Share-based Compensation Arrangement by Share-based Payment Award, Award Requisite Service Period 4 years      
Restricted Stock [Member]        
Note 12 - Share-based Compensation (Details) [Line Items]        
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition   219 days    
Restricted Stock [Member] | Chief Executive Officer [Member]        
Note 12 - Share-based Compensation (Details) [Line Items]        
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period 50,000      
Share-based Compensation Arrangement by Share-based Payment Award, Award Requisite Service Period 6 years      
Share Based Awards [Member]        
Note 12 - Share-based Compensation (Details) [Line Items]        
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition   2 years 109 days