Condensed Consolidated Statement of Stockholders' Equity (Unaudited) - 3 months ended Mar. 31, 2016 - USD ($)	Common Stock [Member]	Additional Paid-in Capital [Member]	Treasury Stock [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]	Total
Balance, January 1, 2016 at Dec. 31, 2015	$ 685,900	$ 50,441,464	$ (37,279,069)	$ 53,258,126	$ (683,956)	$ 66,422,465
Net income				1,276,605		1,276,605
Change in unrealized gain on available-for-sale securities, net of income taxes					508,963	508,963
Dividends on common stock ($0.08 per share)				(354,593)		(354,593)
Stock award plans		(274,710)	361,567			86,857
Stock options exercised	1,500	76,350				77,850
Balance, March 31, 2016 at Mar. 31, 2016	$ 687,400	$ 50,243,104	$ (36,917,502)	$ 54,180,138	$ (174,993)	$ 68,018,147