Note 5 - INCOME TAXES - Reconciliation of the Expected Federal Income Tax Expense (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
INCOME TAXES
Computed "expected" tax expense	$ 5,661	$ 7,165	$ 18,751	$ 16,130
Tax exempt income, net	(3,705)	(3,003)	(10,103)	(7,701)
Bank-owned life insurance	(376)	(127)	(700)	(273)
State income taxes, net of federal benefit, current year	955	1,616	3,383	3,889
Provision adjustment from accounting method change				1,181
Tax Credits	(202)	(359)	(411)	(890)
Income from tax credit equity investments	(449)	(337)	(1,340)	(939)
Acquisition costs		78		450
Excess tax benefit on stock options exercised and restricted stock awards vested	(7)	(46)	(451)	(520)
Other	37	163	540	316
Federal and state income tax expense	$ 1,840	$ 4,824	$ 8,589	$ 8,649
Computed "expected" tax expense (in percentage)	21.00%	21.00%	21.00%	21.00%
Tax exempt income, net (in percentage)	(13.70%)	(8.80%)	(11.30%)	(10.00%)
Bank-owned life insurance (in percentage)	(1.40%)	(0.40%)	(0.80%)	(0.40%)
State income taxes, net of federal benefit, current year (in percentage)	3.50%	4.70%	3.80%	5.10%
Provision adjustment from accounting method change (in percentage)				(1.50%)
Tax credits (in percentage)	(0.70%)	(1.10%)	(0.50%)	(1.20%)
Income from tax credit equity investments (in percentage)	(1.70%)	(1.00%)	(1.50%)	(1.20%)
Acquisition costs (in percentage)		0.20%		0.60%
Excess tax benefit on stock options exercised and restricted stock awards vested (in percentage)	(0.00%)	(0.10%)	(0.50%)	(0.70%)
Other (in percentage)	(0.20%)	(0.40%)	(0.60%)	(0.40%)
Federal and state income tax expense (in percentage)	6.80%	14.10%	9.60%	11.30%