Consolidated Statements of Changes in Stockholders' Equity - USD ($)	Common Stock	Surplus	Retained Earnings	Accumulated Other Comprehensive (Loss) Income	Total
Balances at Dec. 31, 2013	$ 2,747,370	$ 9,713,335	$ 20,300,531	$ (1,178,075)	$ 31,583,161
Balances (in shares) at Dec. 31, 2013	2,747,370
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income			1,914,526		1,914,526
Cash dividends, $.40, $.27 and $.40 per share for December 31, 2014, 2015 and 2016 respectively			(1,102,343)		(1,102,343)
Dividends reinvested under dividend reinvestment plan	$ 13,594	140,784			154,378
Dividends reinvested under dividend reinvestment plan (in shares)	13,594
Other comprehensive loss, net of tax				1,280,805	1,280,805
Balances at Dec. 31, 2014	$ 2,760,964	9,854,119	21,112,714	102,730	33,830,527
Balances (In shares) at Dec. 31, 2014	2,760,964
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income			1,352,616		1,352,616
Cash dividends, $.40, $.27 and $.40 per share for December 31, 2014, 2015 and 2016 respectively			(747,208)		(747,208)
Dividends reinvested under dividend reinvestment plan	$ 12,397	131,945			144,342
Dividends reinvested under dividend reinvestment plan (in shares)	12,397
Other comprehensive loss, net of tax				(404,464)	(404,464)
Balances at Dec. 31, 2015	$ 2,773,361	9,986,064	21,718,122	(301,734)	34,175,813
Balances (In shares) at Dec. 31, 2015	2,773,361
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income			1,100,720		1,100,720
Cash dividends, $.40, $.27 and $.40 per share for December 31, 2014, 2015 and 2016 respectively			(1,111,307)		(1,111,307)
Dividends reinvested under dividend reinvestment plan	$ 13,494	143,792			157,286
Dividends reinvested under dividend reinvestment plan (in shares)	13,494
Other comprehensive loss, net of tax				(508,323)	(508,323)
Balances at Dec. 31, 2016	$ 2,786,855	$ 10,129,856	$ 21,707,535	$ (810,057)	$ 33,814,189
Balances (In shares) at Dec. 31, 2016	2,786,855