Investment Securities (Details)	12 Months Ended
	Dec. 31, 2017 USD ($) segment security	Dec. 31, 2016 USD ($) security	Dec. 31, 2015 USD ($)
Comparison of amortized cost and fair value of securities available for sale [Abstract]
Amortized Cost	$ 46,074,000	$ 57,859,000
Gross Unrealized Gains	368,000	387,000
Gross Unrealized Losses	(720,000)	(755,000)
Fair Value (Carrying Amount)	45,722,000	57,491,000
Gross realized gains (losses), sale proceeds	0	0	$ 0
Realized losses on sales of available-for-sale securities	0	0	0
Realized gains on sales of available-for-sale securities	0	0	0
Other-than-temporary impairment losses	0	0	$ 0
Amortized Cost
Due in one year or less	4,000,000
Due after one year through five years	0
Due after five years through ten years	688,000
Due after ten years	18,995,000
U.S. Government sponsored entities & agencies collateralized by mortgage obligations	22,391,000
Amortized Cost	46,074,000	57,859,000
Fair Value (Carrying Amount)
Due in one year or less	3,737,000
Due after one year through five years	0
Due after five years through ten years	699,000
Due after ten years	19,255,000
U.S. Government sponsored entities & agencies collateralized by mortgage obligations	22,031,000
Fair Value (Carrying Amount)	45,722,000	57,491,000
Fair value of available-for-sale securities pledged as collateral for FHLB borrowings	34,542,543	16,670,290
Trading securities	0	0
Held-to-maturity Securities	0	0
Summarizes temporarily impaired investment securities [Abstract]
Less than 12 Months, Fair Value (Carrying Amount)	9,211,000	38,185,000
Less than 12, Unrealized Losses	(157,000)	(471,000)
12 Months or More, Fair Value (Carrying Amount)	23,945,000	3,716,000
12 Months or More, Unrealized Losses	(563,000)	(284,000)
Total Fair Value (Carrying Amount)	33,156,000	41,901,000
Total Unrealized Losses	$ (720,000)	(755,000)
Number of general segments for the segregation of portfolio | segment	2
U.S. Government agencies
Comparison of amortized cost and fair value of securities available for sale [Abstract]
Amortized Cost	$ 19,683,000	22,992,000
Gross Unrealized Gains	312,000	280,000
Gross Unrealized Losses	(41,000)	(69,000)
Fair Value (Carrying Amount)	19,954,000	23,203,000
Amortized Cost
Amortized Cost	19,683,000	22,992,000
Summarizes temporarily impaired investment securities [Abstract]
Less than 12 Months, Fair Value (Carrying Amount)	1,728,000	12,281,000
Less than 12, Unrealized Losses	(3,000)	(69,000)
12 Months or More, Fair Value (Carrying Amount)	6,625,000	0
12 Months or More, Unrealized Losses	(38,000)	0
Total Fair Value (Carrying Amount)	8,353,000	12,281,000
Total Unrealized Losses	$ (41,000)	$ (69,000)
Number of impaired securities | security	3	4
U.S. Government sponsored entities & agencies collateralized by mortgage obligations
Comparison of amortized cost and fair value of securities available for sale [Abstract]
Amortized Cost	$ 22,391,000	$ 30,867,000
Gross Unrealized Gains	56,000	107,000
Gross Unrealized Losses	(416,000)	(402,000)
Fair Value (Carrying Amount)	22,031,000	30,572,000
Amortized Cost
Amortized Cost	22,391,000	30,867,000
Summarizes temporarily impaired investment securities [Abstract]
Less than 12 Months, Fair Value (Carrying Amount)	7,483,000	25,904,000
Less than 12, Unrealized Losses	(154,000)	(402,000)
12 Months or More, Fair Value (Carrying Amount)	13,583,000	0
12 Months or More, Unrealized Losses	(262,000)	0
Total Fair Value (Carrying Amount)	21,066,000	25,904,000
Total Unrealized Losses	$ (416,000)	$ (402,000)
Number of impaired securities | security	11	11
Mutual Funds
Comparison of amortized cost and fair value of securities available for sale [Abstract]
Amortized Cost	$ 4,000,000	$ 4,000,000
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(263,000)	(284,000)
Fair Value (Carrying Amount)	3,737,000	3,716,000
Amortized Cost
Amortized Cost	4,000,000	4,000,000
Summarizes temporarily impaired investment securities [Abstract]
Less than 12 Months, Fair Value (Carrying Amount)	0	0
Less than 12, Unrealized Losses	0	0
12 Months or More, Fair Value (Carrying Amount)	3,737,000	3,716,000
12 Months or More, Unrealized Losses	(263,000)	(284,000)
Total Fair Value (Carrying Amount)	3,737,000	3,716,000
Total Unrealized Losses	$ (263,000)	$ (284,000)
Number of impaired securities | security	1	1
Carrying Amount
Fair Value (Carrying Amount)
Fair value of available-for-sale securities pledged as collateral for FHLB borrowings	$ 34,780,746	$ 19,653,625