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Note 1 - Nature of Operations, Basis of Presentation and Summary of Significant Accounting Policies - Schedule of Anti-dilutive Securities (Details) - shares
9 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares) 857,754 794,558
Share-Based Payment Arrangement, Option [Member]    
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares) 657,754 594,558
Warrant [Member]    
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares) 200,000 200,000