Federal Taxes on Income - Deferred Tax Assets and Liabilities (Details) - USD ($)	Dec. 31, 2019	Dec. 31, 2018
Deferred tax assets
Allowance for loan losses	$ 2,064,000	$ 2,049,000
Unrealized loss on securities available for sale	409,000	1,264,000
Accrued compensation	487,000	397,000
Nonaccrual loans	6,000	4,000
ESOP timing differences	143,000	195,000
Restricted stock awards	107,000	134,000
Contribution carryforward	0	1,515,000
Deferred lease liability	768,000
Total deferred tax assets	3,984,000	5,558,000
Deferred tax liabilities
Deferred loan fees	443,000	436,000
FHLB stock dividends	425,000	488,000
Accumulated depreciation	691,000	734,000
Deferred investment gain	34,000	14,000
Right of use asset	745,000
Other, net	175,000	23,000
Total deferred tax liabilities	2,513,000	1,695,000
Deferred tax asset, net	1,471,000	3,863,000
Deferred tax asset valuation allowance	0	(1,224,000)
Deferred tax asset, net of valuation allowance	$ 1,471,000	$ 2,639,000