Income Taxes - Reconciliation of income tax expense computed at statutory rate (Details) - USD ($)	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Income Taxes
Income tax expense at federal statutory rate	$ (134,000)	$ 315,000
(Decrease) increase resulting from:
Tax-exempt income	(192,000)	(212,000)
Bank owned life insurance	(37,000)	(34,000)
State income taxes, net of Federal income tax benefit	(162,000)	3,000
Total income tax expense	$ (525,000.000)	$ 72,000