CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY (UNAUDITED) - USD ($) $ in Thousands	Preferred Stock [Member]	Common Stock [Member]	Additional Paid-In Capital [Member]	Retained Earnings [Member]	Accumulated Comprehensive (Loss) Income [Member]	Total
Beginning balance at Dec. 31, 2016	$ 4	$ 121	$ 64,471	$ 23,334		$ 87,930
Balance (in shares) at Dec. 31, 2016	437,500	12,123,179
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income				1,907		1,907
Stock-based compensation			102			102
Dividend declared				(140)		(140)
Exercise of stock options			17			$ 17
Exercise of stock options (in shares)		2,161				5,025
Other comprehensive (loss) income					$ 6	$ 6
Ending balance at Jun. 30, 2017	$ 4	$ 121	64,590	25,101	6	89,822
Balance (in shares) at Jun. 30, 2017	437,500	12,125,340
Beginning balance at Dec. 31, 2017	$ 4	$ 122	65,137	25,872	(35)	91,100
Balance (in shares) at Dec. 31, 2017	437,500	12,233,424
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income				3,803		3,803
Stock-based compensation			113			113
Redemption of preferred stock	$ (4)	$ 4
Redemption of preferred stock (in shares)	(437,500)	437,500
Dividend declared				(70)		(70)
Dividends paid on common stock				(747)		(747)
Exercise of stock options		$ 1	96			$ 97
Exercise of stock options (in shares)		24,002				24,252
Other			(189)			$ (189)
Other comprehensive (loss) income					(66)	(66)
Ending balance at Jun. 30, 2018		$ 127	$ 65,157	$ 28,858	$ (101)	$ 94,041
Balance (in shares) at Jun. 30, 2018		12,694,926