Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income/(Loss) [Member]	Total
Balance at Dec. 31, 2015	$ 73,764	$ 977	$ 11,603	$ (495)	$ 85,849
Balance (in shares) at Dec. 31, 2015	10,676,557
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income			8,051		8,051
Other comprehensive loss, net of tax				(1,855)	(1,855)
Stock dividend adjustment	$ 4		(4)		0
Stock dividend adjustment (in shares)	505
Stock dividend declared	$ 5,088		(5,088)		0
Stock dividend declared (in shares)	428,786
Cash in lieu of fractional shares			(5)		(5)
Cash in lieu of fractional shares (in shares)	(101)
Stock-based compensation	$ 286				286
Tax deficiency related to expired, vested non-qualified stock options	(114)				(114)
Common shares issued related to restricted stock grants and ESPP, net of restricted stock reversals	$ 61				61
Common shares issued related to restricted stock grants and ESPP, net of restricted stock reversals (in shares)	34,976
Stock options exercised, net	$ 25				25
Stock options exercised, net (in shares)	7,723
Balance at Dec. 31, 2016	$ 79,114	977	14,557	(2,350)	92,298
Balance (in shares) at Dec. 31, 2016	11,148,446
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income			8,748		8,748
Other comprehensive loss, net of tax				(1,448)	(1,448)
Stock dividend adjustment	$ 207		(207)		0
Stock dividend adjustment (in shares)	289
Tax Rate Change Reclassification			599	(599)	0
Stock dividend declared	$ 5,806		(5,806)		0
Stock dividend declared (in shares)	447,312
Cash in lieu of fractional shares			(10)		(10)
Cash in lieu of fractional shares (in shares)	(129)
Stock-based compensation	$ 378				378
Tax deficiency related to expired, vested non-qualified stock options					0
Common shares issued related to restricted stock grants and ESPP, net of restricted stock reversals	$ 78				78
Common shares issued related to restricted stock grants and ESPP, net of restricted stock reversals (in shares)	34,211
Balance at Dec. 31, 2017	$ 85,583	977	17,881	(4,397)	100,044
Balance (in shares) at Dec. 31, 2017	11,630,129
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income			12,551		12,551
Other comprehensive loss, net of tax				(639)	(639)
Stock dividend adjustment	$ 240		(240)		0
Stock dividend adjustment (in shares)	628
Stock dividend declared	$ 6,280		(6,280)		0
Stock dividend declared (in shares)	583,514
Cash in lieu of fractional shares			(10)		(10)
Cash in lieu of fractional shares (in shares)	(159)
Stock-based compensation	$ 424				424
Tax deficiency related to expired, vested non-qualified stock options					0
Common shares issued related to restricted stock grants and ESPP, net of restricted stock reversals	$ 91				91
Common shares issued related to restricted stock grants and ESPP, net of restricted stock reversals (in shares)	33,722
Stock options exercised, net					0
Stock options exercised, net (in shares)	5,978
Balance at Dec. 31, 2018	$ 92,618	$ 977	$ 23,902	$ (5,036)	$ 112,461
Balance (in shares) at Dec. 31, 2018	12,253,812