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Note 5 - Patents and Trademarks, Net (Details Textual) - Patents and Trademarks [Member]
 9 Months Ended
May 31, 2016
USD ($)
Finite-Lived Intangible Assets, Amortization Expense, Year Two $ 115,000
Finite-Lived Intangible Assets, Amortization Expense, Year Three 115,000
Finite-Lived Intangible Assets, Amortization Expense, Year Four 115,000
Finite-Lived Intangible Assets, Amortization Expense, Year Five $ 115,000
Finite-Lived Intangible Asset, Useful Life 7 years
Finite-Lived Intangible Assets, Amortization Expense, Remainder of Fiscal Year $ 115,000