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Note 5 - Patents and Trademarks, Net (Tables)
3 Months Ended
Nov. 30, 2012
Schedule of Finite-Lived Intangible Assets [Table Text Block]
   
November 30, 2012
   
August 31, 2012
 
Patents and trademarks
  $ 2,012,729     $ 1,945,785  
Less accumulated amortization
    (1,000,328 )     (984,604 )
    $ 1,012,401     $ 961,181