Note 5 - Income Tax Provision - Reconciliation of Income Tax (Details) - USD ($)	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Income before total federal income tax	$ 532,771	$ 625,729
Tax rate	21.00%	21.00%
Expected income tax expense (benefit)	$ 111,882	$ 131,403
Effect of tax-exempt income	(15,703)	(28,448)
Other	3,870	6,908
State income tax, net	621	25,749
Return-to-Provision adjustments	(126,482)	(89,557)
Prior period adjustments	120,021	2,741
Change in valuation allowance	(32,417)	(901,143)
Total	$ 61,793	$ (852,347)