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Summary of Significant Accounting Policies (Tables)

9 Months Ended

Sep. 30, 2012

Summary of Significant Accounting Policies [Abstract]

Reconciliation of the numerators and denominators of the basic and diluted earnings per share computations

		Three months ended September 30,								Nine months ended September 30,
		2012				2011				2012				2011
Net loss		$	(16,336,790	)		$	(4,334,352	)		$	(25,732,707	)		$	(14,116,780	)
Weighted average shares outstanding used to compute basic and diluted net income or loss per share			30,168,475				14,009,341				25,992,764				13,831,749
Basic and diluted net loss per share		$	(0.54	)		$	(0.31	)		$	(0.99	)		$	(1.02	)

Outstanding potentially dilutive common stock

		2012				2011
Options			474,917				895,962
Restricted stock units			1,516,199				338,041
Warrants			10,689,083				1,434,483
Total			12,680,199				2,668,486

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- Definition

Tabular disclosure of securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) in the future that were not included in the computation of diluted EPS because to do so would increase EPS amounts or decrease loss per share amounts for the period presented, by antidilutive securities.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 260

-SubTopic 10

-Section 50

-Paragraph 1

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257



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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 128

-Paragraph 40

-Subparagraph c

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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

Tabular disclosure of the numerators and the denominators of the basic and diluted per-share (or per-unit) computations for income from continuing operations, including the effect that has been given to preferred dividends.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 260

-SubTopic 10

-Section 50

-Paragraph 1

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257

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