Condensed Consolidated Statement of Stockholders' Equity (Unaudited) (USD $)	Preferred Stock [Member]	Common Stock [Member]	Common Stock Warrants [Member]	Additional Paid-in Capital [Member]	Treasury Stock [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Total
Balance at Dec. 31, 2012	$ 11,789,276	$ 678,180	$ 1,377,811	$ 58,267,529	$ (61,369,344)	$ 39,324,292	$ 800,826	$ 50,868,570
Net income						3,866,379		3,866,379
Change in unrealized gain (loss) on available-for-sale securities, net of income taxes							(2,740,751)	(2,740,751)
Preferred stock discount accretion	145,886					(145,886)
Preferred stock dividends						(450,000)		(450,000)
Common stock warrants repurchased			(1,377,811)	(625,439)				(2,003,250)
Stock award plans				(31,597)	250,795			219,198
Stock options exercised		180		9,229				9,409
Treasury stock purchased					(105,782)			(105,782)
Balance at Sep. 30, 2013	11,935,162	678,360		57,619,722	(61,224,331)	42,594,785	(1,939,925)	49,663,773
Balance at Dec. 31, 2013	11,983,790	678,360		57,655,031	(61,225,185)	43,769,485	(2,506,248)	50,355,233
Net income						4,000,592		4,000,592
Change in unrealized gain (loss) on available-for-sale securities, net of income taxes							1,522,980	1,522,980
Preferred stock redeemed	(12,000,000)							(12,000,000)
Preferred stock discount accretion	16,210					(16,210)
Preferred stock dividends						(338,000)		(338,000)
Dividends on common stock ($0.05 per share)						(431,823)		(431,823)
Stock award plans				(214,642)	426,011			211,369
Stock options exercised		3,960		206,910				210,870
Proceeds from issuance of common stock				(6,850,673)	22,664,985			15,814,312
Balance at Sep. 30, 2014		$ 682,320		$ 50,796,626	$ (38,134,189)	$ 46,984,044	$ (983,268)	$ 59,345,533