Note 5 - Patents and Trademarks, Net (Details Textual) - Patents and Trademarks [Member]	3 Months Ended
	Nov. 30, 2017 USD ($)
Finite-Lived Intangible Asset, Useful Life	7 years
Finite-Lived Intangible Assets, Amortization Expense, Remainder of Fiscal Year	$ 240,000
Finite-Lived Intangible Assets, Amortization Expense, Year Five	240,000
Finite-Lived Intangible Assets, Amortization Expense, Year Two	240,000
Finite-Lived Intangible Assets, Amortization Expense, Year Three	240,000
Finite-Lived Intangible Assets, Amortization Expense, Year Four	$ 240,000