Consolidated Statements of Changes in Shareholder' Equity (Unaudited) - USD ($) $ in Thousands	Common Stock [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]	Total
Balance (in shares) at Dec. 31, 2017	5,064,972
Balance at Dec. 31, 2017	$ 6,415	$ 49,855	$ (570)	$ 55,700
Net income		3,280		3,280
Other comprehensive income (loss)			(1,818)	(1,818)
Exercise of stock options and tax effect (in shares)	17,704
Exercise of stock options and tax effect	$ 82			82
Stock-based compensation expense	$ 47			47
Balance (in shares) at Mar. 31, 2018	5,082,676
Balance at Mar. 31, 2018	$ 6,544	53,135	(2,388)	57,291
Balance (in shares) at Dec. 31, 2018	5,137,476
Balance at Dec. 31, 2018	$ 6,944	62,005	(2,017)	66,932
Net income		3,818		3,818
Other comprehensive income (loss)			1,831	1,831
Exercise of stock options and tax effect (in shares)	13,400
Exercise of stock options and tax effect	$ 76			76
Stock-based compensation expense	$ 50			50
Balance (in shares) at Mar. 31, 2019	5,150,876
Balance at Mar. 31, 2019	$ 7,070	$ 65,823	$ (186)	$ 72,707