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Note 5 - Patents and Trademarks, Net (Tables) | 12 Months Ended
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Aug. 31, 2019
Notes Tables |
Schedule of Finite-Lived Intangible Assets [Table Text Block] |
|  | August 31, 2019 |  | August 31, 2018
Patents and trademarks |  | $ | 2,938,876 |  |  | $ | 2,824,440 |
Less accumulated amortization |  |  | (1,929,907 | ) |  |  | (1,668,183 | )
|  | $ | 1,008,969 |  |  | $ | 1,156,257 |

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