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Note 6 - Net Income (Loss) Per Share - Earnings Per Share Reconciliation (Details) - USD ($)
 3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Numerator for basic and diluted (loss) per share, net (loss) available to common shareholders $ (234,970) $ (250,188)
Denominator:    
Denominator for basic (loss) per share, weighted average shares outstanding (in shares) 26,615,947 26,375,762
Effect of dilutive securities (in shares) 0 0
Denominator for diluted earnings per share, adjusted for weighted average shares and assumed conversion (in shares) 26,615,947 26,375,762
Basic (loss) per common share (in dollars per share) $ (0.01) $ (0.01)
Diluted (loss) per common share and common share equivalent (in dollars per share) $ (0.01) $ (0.01)