Consolidated Statements of Shareholders' Equity - USD ($) $ in Thousands		Preferred Stock [Member]	Common Stock [Member]	Common Stock Including Additional Paid in Capital [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]	Total
Balance at Dec. 31, 2014		$ 19,931		$ 23,891	$ 59,867	$ (87)	$ 103,602
Balance (in shares) at Dec. 31, 2014			13,294,000
Net income					8,586		8,586
Other comprehensive loss, net of tax						(167)	(167)
Comprehensive income							8,419
Dividend on preferred stock					(189)		(189)
Dividend on common stock					(1,600)		(1,600)
Common stock issued under employee plans (in shares)			9,000
Common stock issued under employee plans				36			36
Stock options exercised (in shares)			39,000
Proceeds from stock options exercised				156			156
Compensation expense associated with stock options				42			42
Compensation expense associated with restricted stock				89			89
Preferred stock redemption		(20,000)			(33)		(20,033)
Preferred stock accretion		69			(69)
Stock compensation grants
Balance (in shares) at Dec. 31, 2015			13,342,000
Balance at Dec. 31, 2015	[1]			24,214	66,562	(254)	90,522
Net income					5,259		5,259
Other comprehensive loss, net of tax						(405)	(405)
Comprehensive income							4,854
Dividend on common stock					(1,603)		(1,603)
Common stock issued under employee plans (in shares)			29,000
Common stock issued under employee plans				84			$ 84
Stock options exercised (in shares)			2,000				1,900
Proceeds from stock options exercised				10			$ 10
Compensation expense associated with stock options				24			24
Compensation expense associated with restricted stock				215			215
Preferred stock accretion
Stock compensation grants
Balance (in shares) at Dec. 31, 2016			13,373,000
Balance at Dec. 31, 2016	[1]			24,547	70,218	(659)	94,106
Net income					7,344		7,344
Other comprehensive loss, net of tax						393	393
Comprehensive income							7,737
Dividend on common stock					(1,862)		(1,862)
Common stock issued under employee plans (in shares)			30,000
Common stock issued under employee plans
Stock options exercised (in shares)			52,000				51,900
Proceeds from stock options exercised				245			$ 245
Compensation expense associated with stock options				23			23
Compensation expense associated with restricted stock				$ 196			$ 196
Preferred stock accretion
Stock issued pursuant to public offering, net of underwriting discounts and expenses of $1.7 million			$ 2,738
Stock issued pursuant to public offering, net of underwriting discounts and expenses of $1.7 million (in shares)				26,778,000			26,778,000
Stock compensation grants (in shares)			4,000
Stock compensation grants				$ 41			$ 41
Balance (in shares) at Dec. 31, 2017			16,197,000
Balance at Dec. 31, 2017	[1]			$ 51,830	$ 75,700	$ (266)	$ 127,264

[1] Excludes 43 unvested restricted shares