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Shareholders' Equity (Narrative) (Details) (USD $)
 12 Months Ended 3 Months Ended 12 Months Ended
Aug. 31, 2012
Nov. 14, 2012
Knowledge Capital [Member]
Aug. 31, 2011
Knowledge Capital [Member]
Aug. 31, 2012
Knowledge Capital [Member]
Aug. 31, 2005
Series A Preferred Stock [Member]
Shareholders' Equity [Line Items]          
Shares of preferred stock authorized for issuance 14,000,000        
Stock split         0.25
Common stock warrants issued 6,200,000 1,000,000 1,913,402    
Common stock warrant exercise price 8.00        
Term over which common stock warrants are exercisable 8 years        
Expiration date of warrants March 2013        
Fair value of common stock warrants $ 7,600,000        
Number of shares of common stock purchaseable from warrant     5,913,402    
Common stock issued from treasury stock for warrant exercise   340,877 596,116    
Number of securities remaining after exercise of warrants       4,000,000  
Number of shares already owned       1,015,000  
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  
Amount authorized under common stock purchase plan 10,000,000        
Common stock purchase plan, amount which exceeded, will be paid for by cash 10,000,000        
Number of shares purchased 41,085        
Amount paid for shares purchased $ 400,000