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Note 5 - Patents and Trademarks, Net
 6 Months Ended
Feb. 28, 2013
Intangible Assets Disclosure [Text Block]
5.           PATENTS AND TRADEMARKS, NET

Patents and trademarks, net consisted of the following:

   
February 28,
2013
   
August 31,
2012
 
Patents and trademarks
  $ 2,045,102     $ 1,945,785  
Less accumulated amortization
    (1,018,005 )     (984,604 )
    $ 1,027,097     $ 961,181  

Patent and trademark costs are amortized over seven years.  Costs incurred related to patents and trademarks are capitalized until filed and approved, at which time the amounts capitalized to date are amortized and any further costs, including maintenance costs, are expensed as incurred.  Amortization expense is estimated to approximate $80,000 in each of the next five fiscal years.