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Preferred Stock Warrants and Warrant Liability (Tables)

12 Months Ended

Dec. 31, 2012

Preferred Stock Warrants and Warrant Liability [Abstract]

Information relating Preferred Stock Warrants

Warrants		Remaining Number Outstanding				Exercise Price
Series C Warrants-2008 Loan and Security Agreement			280,803			$	0.7345
Series D Warrants-2009 Convertible Debt			4,368,948			$	0.1198
Series D Warrants-Series D Preferred Stock Issuance			8,347,236			$	0.1198
*Series D Warrants-1 st Amendment			6,243,362			$	0.1198
*Series D Warrants-2 nd Amendment			8,694,558			$	0.1198
*Series D Warrants-3 rd Amendment			4,462,227			$	0.1198
*Series D Warrants-5 th Amendment			2,260,440			$	0.1198
*Series D Warrants-6 th Amendment			6,900,685			$	0.1198
Total			41,558,259

* Warrants issued to lenders in conjunction with amendments to 2008 Loan and Security Agreement (see Note 7).

Fair value of the warrants using binomial lattice valuation model

		2011
Exercise price		$0.1198 – $0.7345
Market value of stock at end of period		$0.01
Expected dividend rate		0.00%
Expected volatility		33.47% – 62.86%
Risk-free interest rate		0.03% – 3.18%
Expected life in years		3.40 – 9.90
Shares underlying warrants outstanding classified as liabilities		41,558,259

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Schedule of warrant activity.

+ References

No definition available.

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- Definition

Tabular disclosure of the inputs and valuation techniques used to measure fair value, and a discussion of changes in valuation techniques and related inputs, if any, used to measure similar assets in prior periods (non-recurring basis) by class of asset or liability.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 820

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (bbb)

-URI http://asc.fasb.org/extlink&oid=7578670&loc=d3e19207-110258



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 157

-Paragraph 33

-Subparagraph d

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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.

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