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Note 6 - Intangible Assets and Goodwill - Accumulated Amortization (Details) - USD ($) | Mar. 31, 2026 | Dec. 31, 2025 | Mar. 31, 2025 | Dec. 31, 2024
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Accumulated amortization | $ 6,336,709 | $ 5,356,315 | $ 3,065,798 | $ 2,847,820
Developed Technology Rights [Member] |  |  |  |
Accumulated amortization | 6,084,327 | 5,116,765 |  |
Licensing Agreements [Member] |  |  |  |
Accumulated amortization | 238,146 | 226,063 |  |
Distribution Rights [Member] |  |  |  |
Accumulated amortization | $ 14,236 | $ 13,487 |  |

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