Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Common Stock [Member]	Surplus [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive (Loss) Income [Member]	Treasury Stock [Member]	Total
BALANCE-Beginning at Dec. 31, 2016	$ 7,453	$ 24,603	$ 41,344	$ (24)	$ (98)	$ 73,278
Net income			3,985			3,985
Other comprehensive income (loss), net of tax				890		890
Dividend declared			(1,042)			(1,042)
Compensation expense recognized on stock options		3				3
Common stock grants to directors	5	63				68
Compensation expense recognized on stock grants, net of unearned compensation expense		48				48
Shares issued under employee stock purchase plan	1	25				26
Purchase treasury stock, 6,557 shares					(97)	(97)
BALANCE-Ending at Jun. 30, 2017	7,459	24,742	44,287	866	(195)	77,159
BALANCE-Beginning at Dec. 31, 2017	7,492	24,998	47,602	19	(342)	79,769
Net income			4,887			4,887
Other comprehensive income (loss), net of tax				(1,579)		(1,579)
Dividend declared			(1,267)			(1,267)
Compensation expense recognized on stock options		2				2
Common stock grants to directors	6	105				111
Compensation expense recognized on stock grants, net of unearned compensation expense		107				107
Shares issued under employee stock purchase plan	2	26				28
BALANCE-Ending at Jun. 30, 2018	$ 7,500	$ 25,238	$ 51,222	$ (1,560)	$ (342)	$ 82,058