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Note 5 - Patents and Trademarks, Net (Tables)
 6 Months Ended
Feb. 29, 2016
Notes Tables  
Schedule of Finite-Lived Intangible Assets [Table Text Block]
    February 29, 2016   August 31, 2015
Patents and trademarks   $ 2,468,080     $ 2,440,022  
Less accumulated amortization     (1,237,320 )     (1,177,803 )
    $ 1,230,760     $ 1,262,219