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Note 7 - Intangible Assets - Schedule of Intangible Assets (Details) - USD ($) | Sep. 30, 2025 | Dec. 31, 2024
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Finite-Lived Intangible Assets, Gross Carrying Value | $ 191,040 | $ 191,040
Finite-Lived Intangible Assets, Accumulated Amortization | (186,264) | (171,936)
Finite-Lived Intangible Assets, Net Book Value | 4,776 | 19,104
Developed Technology Rights [Member] |  |
Finite-Lived Intangible Assets, Gross Carrying Value | 184,100 | 184,100
Finite-Lived Intangible Assets, Accumulated Amortization | (179,498) | (165,690)
Finite-Lived Intangible Assets, Net Book Value | 4,602 | 18,410
Customer Relationships [Member] |  |
Finite-Lived Intangible Assets, Gross Carrying Value | 1,300 | 1,300
Finite-Lived Intangible Assets, Accumulated Amortization | (1,267) | (1,170)
Finite-Lived Intangible Assets, Net Book Value | 33 | 130
Noncompete Agreements [Member] |  |
Finite-Lived Intangible Assets, Gross Carrying Value | 5,640 | 5,640
Finite-Lived Intangible Assets, Accumulated Amortization | (5,499) | (5,076)
Finite-Lived Intangible Assets, Net Book Value | $ 141 | $ 564

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