CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY - USD ($)	Additional Paid-In Capital [Member]	Retained Earnings [Member]	Treasury Stock [Member]	Accumulated Other Comprehensive Income [Member]	Total
Balance beginning at Dec. 31, 2012	$ 28,474,951	$ 5,157,839	$ (1,902,439)	$ 2,200,091	$ 33,930,442
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		4,076,924			4,076,924
Other comprehensive income				(1,244,191)	(1,244,191)
Exercise of stock options	128,477				128,477
Stock-based compensation expense	74,722				74,722
Cash dividends		(2,227,231)			(2,227,231)
Balance ending at Dec. 31, 2013	28,678,150	7,007,532	(1,902,439)	955,900	34,739,143
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		4,398,820			4,398,820
Other comprehensive income				287,122	287,122
Exercise of stock options	26,050				26,050
Stock-based compensation expense	74,908				74,908
Cash dividends		(2,766,061)			(2,766,061)
Balance ending at Dec. 31, 2014	28,779,108	8,640,291	(1,902,439)	1,243,022	36,759,982
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		4,884,288			4,884,288
Other comprehensive income				(250,473)	(250,473)
Exercise of stock options	122,946				122,946
10% Stock dividend 446,597 common 21,945 treasury at $15.72	7,360,703	(7,020,505)	(344,976)		(4,778)
Stock-based compensation expense	78,987				78,987
Cash dividends		(2,439,240)			(2,439,240)
Balance ending at Dec. 31, 2015	$ 36,341,744	$ 4,064,834	$ (2,247,415)	$ 992,549	$ 39,151,712