Note 6 - Earnings Per Share - Computation of Basic and Diluted EPS (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Net income available to common shareholders	$ 7,460	$ 5,991
Weighted-average common shares outstanding (in shares)	5,789,752	5,753,945
Basic EPS (in dollars per share)	$ 1.29	$ 1.04
Weighted Average Number of Shares Outstanding, Diluted, Adjustment (in shares)	29,428	35,280
Weighted-average common and potentially dilutive shares outstanding (in shares)	5,819,180	5,789,225
Diluted EPS (in dollars per share)	$ 1.28	$ 1.03