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Note 8 - Basic and Diluted Earnings Per Common Share - Reconciliation of Net Income and Number of Shares Used in Computations of Basic and Diluted EPS (Details) - USD ($)	3 Months Ended						9 Months Ended
	Sep. 30, 2025	Jun. 30, 2025	Mar. 31, 2025	Sep. 30, 2024	Jun. 30, 2024	Mar. 31, 2024	Sep. 30, 2025	Sep. 30, 2024
Net income	$ 976,000	$ 1,244,000	$ 613,000	$ 862,000	$ 1,644,000	$ 576,000	$ 2,833,000	$ 3,082,000
Basic weighted average common shares outstanding (in shares)	10,354,289			11,075,527			10,525,957	11,103,467
Add: dilutive effect of common stock options (in shares)	130,799			98,212			117,000	90,711
Diluted weighted average common shares outstanding (in shares)	10,485,088			11,173,739			10,642,957	11,194,178
Basic earnings per common share (in dollars per share)	$ 0.09			$ 0.08			$ 0.27	$ 0.28
Diluted earnings per common share (in dollars per share)	$ 0.09			$ 0.08			$ 0.27	$ 0.28

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- Definition

The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

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