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Note 10 - Capital Stock - Summary of Warrant Activity (Details) - USD ($)
 9 Months Ended 12 Months Ended
Sep. 30, 2025
Dec. 31, 2024
Outstanding (in shares) 53,562  
Outstanding, weighted average exercise price (in dollars per share) $ 9.95  
Outstanding, weighted average remaining contractual life (Year) 0 years 6 months
Outstanding, aggregate intrinsic value of vested warrants $ 0 $ 226,567
Issued (in shares) 0  
Exercised (in shares) (52,778)  
Redeemed (in shares) 0  
Expired (in shares) (784)  
Outstanding (in shares) 0 53,562
Outstanding, weighted average exercise price (in dollars per share) $ 9.95 $ 9.95