Taxes on Income (Deferred Tax Assets and Liabilities) (Details) - USD ($)	Jun. 30, 2018	Dec. 31, 2017
Deferred tax assets:
Deferred directors’ fees	$ 197,000	$ 195,000
Allowance for loan losses	133,000	134,000
Net operating loss carryforward	135,000	165,000
AMT credit	34,720	34,720
Charitable contribution	59,000	59,000
Professional fees	48,000	49,000
Securities available-for-sale	351,523	121,082
Fixed assets	(8,000)	0
Other	12,280	23,278
Gross deferred tax assets	962,523	781,080
Valuation allowance	(100,000)	(96,000)
Net deferred tax assets	862,523	685,080
Deferred tax liabilities:
Prepaid expenses	(14,000)	(14,000)
FHLB stock dividends	(25,000)	(25,000)
Intangible assets	(15,000)	(15,000)
Gross deferred tax liabilities	(54,000)	(54,000)
Net deferred tax assets	$ 808,523	$ 631,080