Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Common Stock [Member]	Treasury Stock [Member]	Surplus [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Loss [Member]	Total
Balance at Dec. 31, 2015	$ 2,955	$ (2,015)	$ 35,097	$ 21,436	$ (1,985)	$ 55,488
Net income				1,556		1,556
Other comprehensive income					950	950
Restricted stock compensation expense	29		631			660
Taxes on exercise of stock options and share award vest	(15)		(421)			(436)
Tax benefit for stock option exercises and restricted stock vest			64			64
Cash dividends - common				(199)		(199)
Sale of treasury shares to 401(k)		37	28			65
Sale of treasury shares to deferred comp. plan		18	14			32
Balance at Mar. 31, 2016	2,969	(1,960)	35,413	22,793	(1,035)	58,180
Balance at Dec. 31, 2016	4,351	(1,730)	68,973	25,520	(2,274)	94,840
Net income				2,441		2,441
Other comprehensive income					100	100
Restricted stock compensation expense	4		103			107
Exercise of stock options	7		(7)
Taxes on exercise of stock options and share award vest			(135)			(135)
Tax benefit for stock option exercises and restricted stock vest			110			110
Cash dividends - common				(297)		(297)
Sale of treasury shares to 401(k)		54	31			85
Sale of treasury shares to deferred comp. plan		23	14			37
Balance at Mar. 31, 2017	$ 4,362	$ (1,653)	$ 69,089	$ 27,664	$ (2,174)	$ 97,288