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Preferred Stock Convertible Redeemable Series E Preferred Stock (Details) (USD $) | 12 Months Ended |  |  | 0 Months Ended | 12 Months Ended |  |  | 0 Months Ended |  |  |  |  |  |
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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

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- Definition Value of temporary equity outstanding, excluding additional paid in capital. Temporary equity is a security with redemption features that are outside the control of the issuer, is not classified as an asset or liability in conformity with GAAP, and is not mandatorily redeemable. Includes any type of security that is redeemable at a fixed or determinable price or on a fixed or determinable date or dates, is redeemable at the option of the holder, or has conditions for redemption which are not solely within the control of the issuer. If convertible, the issuer does not control the actions or events necessary to issue the maximum number of shares that could be required to be delivered under the conversion option if the holder exercises the option to convert the stock to another class of equity. If the security is a warrant or a rights issue, the warrant or rights issue is considered to be temporary equity if the issuer cannot demonstrate that it would be able to deliver upon the exercise of the option by the holder in all cases. Includes stock with put option held by ESOP and stock redeemable by holder only in the event of a change in control of the issuer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Emerging Issues Task Force (EITF) -Number D-98 -Paragraph 2,4,5,6 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 129 -Paragraph 2,3,4,5,6,7,8 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Principles Board Opinion (APB) -Number 12 -Paragraph 10 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 4 -Section 08 -Paragraph d Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 28 -Article 5 + Details
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