CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY (Unaudited) - USD ($)	Additional Paid-In Capital [Member]	Retained Earnings [Member]	Treasury Stock [Member]	Accumulated Other Comprehensive Income [Member]	Total
Balance, beginning 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		$ 2,065,725			2,065,725
Other comprehensive income				$ 172,081	172,081
Exercise of stock options	$ 26,050				26,050
Stock-based compensation expense	$ 36,780				36,780
Cash dividends		$ (1,159,961)			(1,159,961)
Balance, ending at Jun. 30, 2014	$ 28,740,980	7,913,296	$ (1,902,439)	$ 1,127,981	35,879,818
Balance, beginning 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		$ 2,458,397			2,458,397
Other comprehensive income				$ (289,891)	(289,891)
Exercise of stock options	$ 113,254				113,254
Stock-based compensation expense	$ 38,907				38,907
Cash dividends		$ (1,160,952)			(1,160,952)
Balance, ending at Jun. 30, 2015	$ 28,931,269	$ 9,937,736	$ (1,902,439)	$ 953,131	$ 37,919,697