Preferred Stock Convertible Redeemable Series E Preferred Stock (Details) (USD $)	12 Months Ended				0 Months Ended	12 Months Ended				0 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Oct. 25, 2012	Nov. 19, 2010	Nov. 19, 2010 Series E Seven Percent Senior Convertible Preferred Stock [Member]	Dec. 31, 2012 Series E Seven Percent Senior Convertible Preferred Stock [Member]	Sep. 30, 2012 Warrant to purchase 0.25 of a share of Common Stock [Member]	Nov. 19, 2010 Warrant to purchase 0.25 of a share of Common Stock [Member]	Nov. 19, 2010 Warrant to purchase 0.0155 of a share of Common Stock [Member]	Nov. 19, 2010 Preferred Offering Unit [Member]	Dec. 31, 2012 Derivative Financial Instruments, Liabilities [Member]	Dec. 31, 2011 Derivative Financial Instruments, Liabilities [Member]	Dec. 31, 2010 Derivative Financial Instruments, Liabilities [Member]	Dec. 31, 2012 Warrants [Member]	Dec. 31, 2011 Warrants [Member]	Dec. 31, 2010 Warrants [Member]
Class of Stock [Line Items]
Percent of Preferred Shares Required to be Redeemed Monthly						3.7037%
Preferred Offering Units				10,582,011
Number of Shares of Preferred Stock Included in Preferred Offering Unit					1
Preferred Stock, Dividend Rate, Percentage					7.00%
Preferred stock, par value	$ 0.01	$ 0.01		$ 0.01
Class of Warrant or Right, Number of Securities Called by Warrants or Rights								0.25	0.0155
Stock and Warrants Issued During Period, Shares, Preferred Stock and Warrants							1,769,588	1,322,486	164,418
Sale of Stock, Price Per Share				$ 0.945
Net proceeds from issuance of capital stock	$ 16,428,827	$ 21,152,682								$ 10,000,000
Net Proceeds from Issuance or Sale of Equity										8,876,700
Preferred Stock, Shares Outstanding	10,000	10,000	2,351,558
Common stock issued in payment of dividends for the Convertible Redeemable Series E 7% Preferred Stock	3,400,000
Proceeds from (Repurchase of) Redeemable Preferred Stock		2,500,000
Payments of Dividends, Preferred Stock and Preference Stock	3,100,000
Payments for Repurchase of Redeemable Preferred Stock	235,000
Increase (Decrease) in Interest Payable, Net	36,000
Common Stock Dividends, Shares	7,950,107
Convertible Redeemable Series E Preferred Stock; 10,582,011 shares designated, liquidation value $1.00 per share; issued and outstanding 0 shares and 6,662,748 shares at December 31, 2012 and 2011, respectively	0	4,811,326
Fair Value, Measurement with Unobservable Inputs Reconciliations, Recurring Basis, Liability Value											$ 0	$ 391,700	$ 2,281,800	$ 101,200	$ 82,700	$ 289,600