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Note 2 - Accounting Policies - Computation of Basic and Diluted Earnings Per Share (Details) - USD ($)
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Numerator for basic and diluted earnings per share $ 2,186,000 $ 610,000
Denominator for basic earnings per share – weighted-average shares (in shares) 6,497,000 6,358,000
Effect of dilutive securities employee stock options and restricted stock (in shares) 206,000 35,000
Denominator for diluted earnings per share – adjusted weighted-average shares (in shares) 6,703,000 6,393,000
Earnings per common share- basic (in dollars per share) $ 0.34 $ 0.1
Earnings per common share- diluted (in dollars per share) $ 0.33 $ 0.1