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Note 12 - Stockholders' Equity - Stock Options Plan (Details) - USD ($)
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Outstanding (in shares) 664,000  
Outstanding, Weighted Average Exercise Price (in dollars per share) $ 6.46  
Granted (in shares) 288,260  
Granted, Weighted Average Exercise Price (in dollars per share) $ 5.79  
Terminated/forfeited(2) (in shares) [1] (135,500)  
Terminated/forfeited(2), Weighted Average Exercise Price (in dollars per share) [1] $ 6.77  
Exercised (in shares) (15,000) 0
Exercised, Weighted Average Exercise Price (in dollars per share) $ 4.81  
Outstanding (in shares) 801,760 664,000
Outstanding, Weighted Average Exercise Price (in dollars per share) $ 6.2 $ 6.46
Outstanding, Weighted Average Remaining Contractual Term (Year) 5 years 7 months 9 days  
Outstanding, Aggregate Intrinsic Value [2] $ (38,234)  
Exercisable as of December 31, 2025 (in shares) 350,500  
Exercisable as of December 31, 2025 (in dollars per share) $ 7.27  
Exercisable, Weighted Average Remaining Contractual Term (Year) 3 years 1 month 6 days  
Exercisable, Aggregate Intrinsic Value [2] $ (393,527)  
Expected to vest as of December 31, 2025 (in shares) 451,260  
Expected to vest as of December 31, 2025 (in dollars per share) $ 5.36  
Expected to vest, Weighted Average Remaining Contractual Term (Year) 7 years 6 months 21 days  
Expected to vest, Aggregate Intrinsic Value [2] $ 355,293  
[1] Terminations and forfeitures are recognized when they occur.
[2] Intrinsic value is the difference between the fair market value of the underlying common stock as of December 31, 2025 and as of the date of the option grant (which is equal to the option exercise price).