Consolidated Statements of Shareholders' Equity (Unaudited) - USD ($) shares in Thousands, $ in Thousands		Common Stock [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]	Total
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 Dec. 31, 2016	[1]	$ 24,547	70,218	(659)	94,106
Net income			7,337		7,337
Other comprehensive income (loss), net of tax				1,130	1,130
Comprehensive income					8,467
Dividend on common stock			(1,376)		(1,376)
Common stock issued under employee plans (in shares)		31
Common stock issued under employee plans		$ 41			41
Stock options exercised (in shares)		52
Stock options exercised		$ 247			247
Compensation expense associated with stock options		18			18
Compensation expense associated with restricted stock		$ 124			124
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
Balance (in shares) at Sep. 30, 2017	[2]	16,194
Balance at Sep. 30, 2017	[2]	$ 51,755	$ 76,179	$ 471	$ 128,405

[1] Excludes 67 unvested restricted shares

[2] Excludes 71 unvested restricted shares