Note I - Income Taxes - Reconciliation of Federal Income Tax Rate (Details) - USD ($)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Taxes computed at statutory rate, tax	$ 2,370,000	$ 1,367,000	$ 1,815,000
Taxes computed at statutory rate, rate	21.00%	21.00%	21.00%
Tax-exempt interest income, tax	$ (191,000)	$ (198,000)	$ (187,000)
Tax-exempt interest income, rate	(2.00%)	(3.00%)	(2.00%)
Income from BOLI, tax	$ (102,000)	$ (93,000)	$ (91,000)
Income from BOLI, rate	(1.00%)	(1.00%)	(1.00%)
Federal tax credits, tax	$ (1,416,000)	$ (45,000)	$ 0
Federal tax credits, rate	(12.00%)	(1.00%)	0.00%
Other, tax	$ (251,000)	$ 172,000	$ 6,000
Other, rate	(2.00%)	2.00%	0.00%
Other changes in valuation allowance, tax	$ 1,711,000	$ (3,634,000)	$ (1,481,000)
Other changes in valuation allowance, rate	15.00%	(55.00%)	(17.00%)
Totals	$ 2,121,000	$ (2,431,000)	$ 62,000
Total income tax (benefit) expense, rate	19.00%	(37.00%)	1.00%