CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY - 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, 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				1,885		1,885
Stock-based compensation			56			56
Dividend declared				(70)		(70)
Dividends paid on common stock				(367)		(367)
Exercise of stock options			56			$ 56
Exercise of stock options (in shares)		14,202				14,202
Other			(189)			$ (189)
Other comprehensive income (loss)					(54)	(54)
Ending balance at Mar. 31, 2018	$ 4	$ 122	65,060	27,320	(89)	92,417
Balance (in shares) at Mar. 31, 2018	437,500	12,247,626
Beginning balance at Dec. 31, 2018		$ 128	65,538	32,860	(73)	98,453
Balance (in shares) at Dec. 31, 2018		12,759,576
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income				2,609		2,609
Stock-based compensation			43			43
Dividends paid on common stock				(382)		(382)
Exercise of stock options			81			$ 81
Exercise of stock options (in shares)		15,511				15,511
Other comprehensive income (loss)					24	$ 24
Ending balance at Mar. 31, 2019		$ 128	$ 65,662	$ 35,087	$ (49)	$ 100,828
Balance (in shares) at Mar. 31, 2019		12,775,087