Fair Value Measurements (Details 1) (USD $)	12 Months Ended	9 Months Ended
Dec. 31, 2011	Dec. 31, 2010	Sep. 30, 2012 Warrant liability [Member]
Reconciliation of warrant liability measured at fair value
Beginning Balance	$ 8,171,518	$ 635,276	$ 13,087,000
Issuance of additional warrants	4,994,307	7,071,010	11,078,000
Exercise of warrants	(4,841,519)
Change in fair value of derivative liability	4,762,694	465,232	(17,192,000)
Ending Balance	$ 13,087,000	$ 8,171,518	$ 6,973,000

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Amount of gain (loss) recognized in earnings, arising from liabilities measured at fair value on a recurring basis using unobservable inputs (level 3).

+ 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 (c)(1)

-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 32

-Subparagraph c(1)

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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

+ Details

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- Definition

Issues that have taken place during the period in relation to liabilities measured at fair value and categorized within Level 3 of the fair value hierarchy.

+ References

+ Details

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- Definition

Settlements that have taken place during the period in relation to liabilities measured at fair value and categorized within Level 3 of the fair value hierarchy.

+ References

+ Details

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- Definition

This element represents a liability measured at fair value using significant unobservable inputs (Level 3) which is required for reconciliation purposes of beginning and ending balances.

+ References

+ Details

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