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Note 6 - Patents and Trademarks, Net (Tables) | 3 Months Ended
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Nov. 30, 2021
Patents and Trademarks [Member] |
Notes Tables |
Schedule of Finite-Lived Intangible Assets [Table Text Block] |
|  | November 30, 2021 |  |  | August 31, 2021 |
Patents and trademarks |  | $ | 3,070,704 |  |  | $ | 3,018,507 |
Less accumulated amortization |  |  | (2,360,829 | ) |  |  | (2,308,935 | )
|  | $ | 709,875 |  |  | $ | 709,572 |

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