Income Taxes - Reconciliation of income tax expense computed at statutory rate (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Income Taxes
Income tax expense at federal statutory rate	$ 650	$ 453
(Decrease) increase resulting from:
Tax-exempt income	(181)	(75)
Bank owned life insurance	(33)	(33)
State income taxes, net of Federal income tax benefit	133	146
Other	8
Total income tax expense	$ 577	$ 491