Federal Income Taxes (Details 3) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Reconciliation between (tax -benefit) expense
Statutory tax expense		$ 1,815	$ 2,153	$ 2,301
Tax effect of non-taxable interest income		(347)	(319)	(663)
Tax effect of earnings on bank-owned life insurance-net		(94)	(403)	(414)
Tax effect of deferred tax valuation provision			28
Change in corporate tax rate	[1]			1,246
Tax effect of low income housing credit		(156)	(140)	(149)
Tax effect of non-deductible expenses		141	96	96
Federal income tax expense (benefit)		$ 1,359	$ 1,415	$ 2,417

[1] The tax act lowers the base corporate tax rate from 35% to 21% which was applied to the existing deferred tax balance.