Note 6 - Earnings Per Share - Computation of Basic and Diluted EPS (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Net income available to common shareholders	$ 7,689	$ 4,859	$ 22,875	$ 16,222
Weighted-average common shares outstanding (in shares)	5,634,182	5,643,897	5,649,332	5,212,500
Basic EPS (in dollars per share)	$ 1.36	$ 0.86	$ 4.05	$ 3.11
Weighted Average Number of Shares Outstanding, Diluted, Adjustment, Total (in shares)	31,400	38,861	31,996	40,723
Weighted-average common and potentially dilutive shares outstanding (in shares)	5,665,582	5,682,758	5,681,328	5,253,223
Diluted EPS (in dollars per share)	$ 1.36	$ 0.85	$ 4.03	$ 3.09