Investment Securities (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Investment Securities
Amortized Cost	$ 90,268	$ 95,944
Gross Unrealized Gains	363	110
Gross Unrealized Losses	(1,282)	(1,448)
Securities available for sale	89,349	94,606
Collaterized mortgage obligations
Investment Securities
Mortgage-backed, due in monthly installments	24,063	31,997
Gross Unrealized Gains	20	11
Gross Unrealized Losses	(569)	(423)
Mortgage-backed, due in monthly installments	23,514	31,585
Agency mortgage-backed securities
Investment Securities
Mortgage-backed, due in monthly installments	25,725	27,110
Gross Unrealized Gains	4	2
Gross Unrealized Losses	(500)	(429)
Mortgage-backed, due in monthly installments	25,229	26,683
Municipal securities
Investment Securities
Amortized Cost	35,453	34,333
Gross Unrealized Gains	339	92
Gross Unrealized Losses	(159)	(580)
Securities available for sale	35,633	33,845
U.S. Government agency securities
Investment Securities
Amortized Cost	3,526	1,003
Gross Unrealized Losses	(46)	(16)
Securities available for sale	3,480	987
U.S. Treasury securities
Investment Securities
Amortized Cost	1,501	1,501
Gross Unrealized Gains		5
Gross Unrealized Losses	(8)
Securities available for sale	$ 1,493	$ 1,506

Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading.

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