Consolidated Statements of Changes in Stockholders' Equity (USD $)	Total	Preferred Stock Series A [Member]	Preferred Stock Series D [Member]	Preferred Stock [Member]	Common Stock [Member]	Retained Earnings [Member]	Retained Earnings [Member] Preferred Stock Series A [Member]	Retained Earnings [Member] Preferred Stock Series D [Member]	Accumulated Other Comprehensive Loss [Member]
Balance, value at Dec. 31, 2011	$ 30,226,562			$ 3,868,807	$ 12,009,588	$ 14,405,467			$ (57,300)
Balance, shares at Dec. 31, 2011					3,536,724
Net income	1,806,481					1,806,481
Other comprehensive income	7,250								7,250
Common stock options exercised, value	30,111				30,111
Common stock options exercised, shares					6,260
Dividends declared and accrued on convertible Series A preferred stock ($.47 per share)		(89,308)					(89,308)
Dividends declared and accrued on convertible Series D preferred stock ($.26 per share)			(48,008)					(48,008)
Stock-based compensation, net of tax benefit	16,479				16,479
Balance, value at Sep. 30, 2012	31,949,567			3,868,807	12,056,178	16,074,632			(50,050)
Balance, shares at Sep. 30, 2012					3,542,984
Balance, value at Dec. 31, 2012	32,237,301			3,868,807	12,061,153	16,367,187			(59,846)
Balance, shares at Dec. 31, 2012					3,542,984
Net income	2,188,502					2,188,502
Other comprehensive income	14,457								14,457
Dividends declared and accrued on convertible Series A preferred stock ($.47 per share)		(89,225)					(89,225)
Dividends declared and accrued on convertible Series D preferred stock ($.26 per share)			(47,965)					(47,965)
Balance, value at Sep. 30, 2013	$ 34,303,070			$ 3,868,807	$ 12,061,153	$ 18,418,499			$ (45,389)
Balance, shares at Sep. 30, 2013					3,542,984