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Note 6 - Intangible Assets (Tables) | 12 Months Ended
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Dec. 31, 2020
Notes Tables |
Schedule of Finite-Lived Intangible Assets [Table Text Block] |
2020 |  |  |  |  |  |  |  |  |  |  |  |
Intangible Assets |  | Cost |  |  | Accumulated Amortization |  |  | Carrying Amount |
Patents, Copyrights and Intellectual Property |  | $ | 792,821 |  |  | $ | 515,665 |  |  | $ | 277,156 |
Licensing Agreement |  |  | 10,000 |  |  |  | 10,000 |  |  |  | 0 |
Certifications |  |  | 85,032 |  |  |  | 73,531 |  |  |  | 11,501 |
Totals |  | $ | 887,853 |  |  | $ | 599,196 |  |  | $ | 288,657 |
2019 |  |  |  |  |  |  |  |  |  |  |  |
Intangible Assets |  | Cost |  |  | Accumulated Amortization |  |  | Carrying Amount |
Patents, Copyrights and Intellectual Property |  | $ | 836,544 |  |  | $ | 413,957 |  |  | $ | 422,587 |
Licensing Agreement |  |  | 10,000 |  |  |  | 10,000 |  |  |  | 0 |
Certifications |  |  | 83,272 |  |  |  | 64,682 |  |  |  | 18,590 |
Totals |  | $ | 929,816 |  |  | $ | 488,639 |  |  | $ | 441,177 |
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block] |
Year Ended |  |  |  |
2021 |  | $ | 108,344 |
2022 |  |  | 16,852 |
2023 |  |  | 14,199 |
2024 |  |  | 10,658 |
2025 |  |  | 10,658 |
Thereafter |  |  | 127,946 |
Total |  | $ | 288,657 |

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