Consolidated Statements of Shareholders' Equity (Unaudited) - USD ($) shares in Thousands, $ in Thousands		Common Stock Including Additional Paid in Capital [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]	Total
Balance at Dec. 31, 2016	[1]	$ 24,547	$ 70,218	$ (659)	$ 94,106
Balance (in shares) at Dec. 31, 2015		13,342
Balance at Dec. 31, 2015		$ 24,214	66,562	(254)	90,522
Net income			5,259		5,259
Other comprehensive income (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
Common stock issued under employee plans		$ 84			84
Stock options exercised (in shares)		2
Stock options exercised		$ 10			10
Compensation expense associated with stock options		24			24
Compensation expense associated with restricted stock		$ 215			215
Balance (in shares) at Dec. 31, 2016	[1]	13,373
Balance at Jun. 30, 2017	[2]	$ 51,651	73,789	512	125,952
Balance at Dec. 31, 2016	[1]	$ 24,547	70,218	(659)	94,106
Net income			4,461		4,461
Other comprehensive income (loss), net of tax				1,171	1,171
Comprehensive income					5,632
Dividend on common stock			(890)		(890)
Stock issued pursuant to public offering, net of underwriting discounts and expenses of $1.7 million (in shares)		2,738
Stock issued pursuant to public offering, net of underwriting discounts and expenses of $1.7 million		$ 26,778			26,778
Common stock issued under employee plans (in shares)		29
Common stock issued under employee plans		$ 41			41
Stock options exercised (in shares)		48
Stock options exercised		$ 220			220
Compensation expense associated with stock options		10			10
Compensation expense associated with restricted stock		$ 55			$ 55
Balance (in shares) at Jun. 30, 2017	[2]	16,188

[1] Excludes 67 unvested restricted shares

[2] Excludes 72 unvested restricted shares