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Note 7 - Intangible Assets - Schedule of Intangible Assets (Details) - USD ($)
Sep. 30, 2025
Dec. 31, 2024
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