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Note 5 - Patents and Trademarks, Net - Patents and Trademarks, Net (Details) - USD ($) | Aug. 31, 2019 | Aug. 31, 2018
--- | --- | ---
Patents and trademarkes, net | $ 1,008,969 | $ 1,156,257
Patents and Trademarks [Member] |  |
Patents and trademarks | 2,938,876 | 2,824,440
Less accumulated amortization | (1,929,907) | (1,668,183)
Patents and trademarkes, net | $ 1,008,969 | $ 1,156,257

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