Federal Taxes on Income - Reconciliation of Tax Provision (Benefit) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Effective Income Tax Rate Reconciliation, Amount [Abstract]
Income taxes computed at statutory rates	$ 2,329	$ 1,823
Tax-exempt income	(83)	(84)
Bank-owned life insurance income	(149)	(125)
Deferred tax asset valuation allowance	(1,224)	(1)
Expiration of contribution carryforward	1,224	0
Other, net	(20)	(38)
Total provision (benefit) for income taxes	$ 2,077	$ 1,575