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Note 3 - Intangible Assets (Details Textual) - USD ($)
 3 Months Ended 9 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2025
Sep. 30, 2024
Dec. 31, 2024
Amortization of Intangible Assets $ 55,253 $ 54,205 $ 164,652 $ 160,807  
Finite-Lived Intangible Asset, Expected Amortization, Remainder of Fiscal Year 55,530   55,530    
Finite-Lived Intangible Asset, Expected Amortization, Year Three 222,120   222,120    
Finite-Lived Intangible Asset, Expected Amortization, Year One 222,120   222,120    
Finite-Lived Intangible Asset, Expected Amortization, Year Two 222,120   222,120    
Finite-Lived Intangible Asset, Expected Amortization, Year Four 222,120   222,120    
Finite Lived Intangible Asset, Expected Amortization, After Year Four 1,008,475   1,008,475    
Trademarks [Member]          
Indefinite-Lived Intangible Assets (Excluding Goodwill) 26,529   26,529   $ 22,767
Patents Yet to be Awarded [Member]          
Finite-Lived Intangible Assets, Gross $ 699,373   $ 699,373   $ 541,081