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Shareholders' Equity (Details)
$ / shares in Units, $ in Thousands
 12 Months Ended
Mar. 27, 2015
USD ($)
Jan. 23, 2015
shares
Mar. 07, 2013
shares
Aug. 31, 2015
USD ($)
item
shares
Aug. 31, 2013
USD ($)
shares
May. 20, 2015
shares
Aug. 31, 2014
USD ($)
shares
Aug. 31, 2012
USD ($)
Aug. 31, 2005
$ / shares
shares
Shareholders' Equity [Line Items]                  
Preferred Stock, Shares Authorized       14,000,000          
Shares of preferred stock authorized for issuance       14,000,000          
Preferred stock issued       0     0    
Preferred stock outstanding       0     0    
Common stock warrants issued                 6,200,000
Common stock warrant exercise price | $ / shares                 $ 8.00
Common stock issued from treasury stock for warrant exercise     2,300,000   1,700,000        
Payments for exercise of common stock warrants | $         $ 55        
Amount authorized under common stock purchase plan | $ $ 40,000                
Number of shares withheld for minimum statutory taxes       17,935          
Values of withheld shares | $       $ 300          
Stock repurchase program, authorized amount | $ 40,000                
Stock repurchased during period, shares   10,000,000   759,914          
Stock repurchased during period, value | $       $ 14,100          
Available cash for debt financing for repurchase common stock | $ 10,000                
Cash and cash equivalents | $ $ 10,000     $ 16,234 $ 12,291   $ 10,483 $ 11,011  
Knowledge Capital [Member]                  
Shareholders' Equity [Line Items]                  
Number of shares of common stock purchasable from warrant       5,900,000          
Number of shares remaining after exercise of warrants       2,800,000          
Number of shares held in treasury       2,200,000          
Number of shares sold           400,000      
Expiration date of warrants       Mar. 08, 2013          
Period after the date on which the warrant has been exercised       1 year          
Period which company must notify intent to sell common shares       5 days          
Period which company must wait to sell common shares if requested       120 days          
Number of members of Boards of Directors with equity interest | item       2