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						2,520,393		2,520,393
Change in unrealized gain (loss) on available-for-sale securities, net of income taxes							(2,715,164)	(2,715,164)
Preferred stock discount accretion	97,257					(97,257)
Preferred stock dividends						(300,000)		(300,000)
Common stock warrants repurchased			(1,377,811)	(625,439)				(2,003,250)
Stock award plans				(63,520)	250,795			187,275
Stock options exercised		180		9,229				9,409
Treasury stock purchased					(105,782)			(105,782)
Balance at Jun. 30, 2013	11,886,533	678,360		57,587,799	(61,224,331)	41,447,428	(1,914,338)	48,461,451
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						2,640,109		2,640,109
Change in unrealized gain (loss) on available-for-sale securities, net of income taxes							1,589,452	1,589,452
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)						(215,329)		(215,329)
Stock award plans				(215,059)	388,236			173,177
Stock options exercised		1,630		83,176				84,806
Proceeds from issuance of common stock				(6,850,673)	22,664,985			15,814,312
Balance at Jun. 30, 2014		$ 679,990		$ 50,672,475	$ (38,171,964)	$ 45,840,055	$ (916,796)	$ 58,103,760