CONDENSED CONSOLIDATED STATEMENT OF CHANGES IN STOCKHOLDERS' EQUITY (Unaudited) - USD ($) $ in Thousands	Accumulated Other Comprehensive Gain (Loss)	Retained Earnings	Additional Paid-in Capital	Common shares	Total
Balance at Dec. 31, 2017	$ (1,390)	$ (1,960)	$ 86,660	$ 73	$ 83,383
Balance (in shares) at Dec. 31, 2017				7,326,536
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		5,861			5,861
Other comprehensive income (loss)	(2,431)				(2,431)
Exercise of stock options, net of repurchases			377	$ 1	378
Exercise of stock options, net of repurchases (in shares)				42,687
Restricted stock grants (in shares)				76,500
Stock compensation expense			1,304		1,304
Balance at Sep. 30, 2018	(3,821)	3,901	88,341	$ 74	88,495
Balance (in shares) at Sep. 30, 2018				7,445,723
Balance at Jun. 30, 2018	(3,257)	2,219	87,460	$ 74	86,496
Balance (in shares) at Jun. 30, 2018				7,445,723
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		1,682			1,682
Other comprehensive income (loss)	(564)				(564)
Stock compensation expense			881		881
Balance at Sep. 30, 2018	(3,821)	3,901	88,341	$ 74	88,495
Balance (in shares) at Sep. 30, 2018				7,445,723
Balance at Dec. 31, 2018	(2,614)	6,774	88,539	$ 75	92,774
Balance (in shares) at Dec. 31, 2018				7,532,723
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		10,270			10,270
Other comprehensive income (loss)	3,000				3,000
Exercise of stock options, net of repurchases			50		50
Exercise of stock options, net of repurchases (in shares)				8,947
Stock compensation expense			809		809
Balance at Sep. 30, 2019	386	17,044	89,398	$ 75	106,903
Balance (in shares) at Sep. 30, 2019				7,541,670
Balance at Jun. 30, 2019	(80)	13,227	89,129	$ 75	102,351
Balance (in shares) at Jun. 30, 2019				7,536,723
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		3,817			3,817
Other comprehensive income (loss)	466				466
Exercise of stock options, net of repurchases (in shares)				4,947
Stock compensation expense			269		269
Balance at Sep. 30, 2019	$ 386	$ 17,044	$ 89,398	$ 75	$ 106,903
Balance (in shares) at Sep. 30, 2019				7,541,670