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Note 5 - Patents and Trademarks, Net (Details Textual) - Patents and Trademarks [Member]
 3 Months Ended
Nov. 30, 2016
USD ($)
Finite-Lived Intangible Asset, Useful Life 7 years
Finite-Lived Intangible Assets, Amortization Expense, Remainder of Fiscal Year $ 120,000
Finite-Lived Intangible Assets, Amortization Expense, Year Two 120,000
Finite-Lived Intangible Assets, Amortization Expense, Year Three 120,000
Finite-Lived Intangible Assets, Amortization Expense, Year Four 120,000
Finite-Lived Intangible Assets, Amortization Expense, Year Five $ 120,000