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Note 7 - Patents (Tables) | 9 Months Ended
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Sep. 30, 2020
Notes Tables |
Schedule of Finite-Lived Intangible Assets [Table Text Block] |
September 30, 2020 |  | Cost |  |  | Accumulated Amortization |  |  | Net |
Patents-foundation intellectual property |  | $ | 1,377,863 |  |  | $ | (1,035,362 | ) |  | $ | 342,501 |
Total |  | $ | 1,377,863 |  |  | $ | (1,035,362 | ) |  | $ | 342,501 |
December 31, 2019 |  | Cost |  |  | Accumulated Amortization |  |  | Net |
Patents-foundation intellectual property |  | $ | 1,377,863 |  |  | $ | (995,603 | ) |  | $ | 382,260 |
Total |  | $ | 1,377,863 |  |  | $ | (995,603 | ) |  | $ | 382,260 |

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