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Stock-Based Compensation (Details 4) (USD $)	6 Months Ended
	Jun. 30, 2012
Summary of outstanding warrants to purchase common stock
Investment Warrants, Exercise Price	$ 3.13
Shares	5,182,106
September 2007 Investor Warrant [Member]
Summary of outstanding warrants to purchase common stock
Investment Warrants, Exercise Price	$ 31.75
Issue Date	Sep. 26, 2007
Shares	233
Expiration Date	Sep. 26, 2012
August 2009 Employee Warrants [Member]
Summary of outstanding warrants to purchase common stock
Investment Warrants, Exercise Price	$ 0.50
Issue Date	Aug. 25, 2009
Shares	240,000
Expiration Date	Aug. 25, 2016
January 2010 Investor Warrant [Member]
Summary of outstanding warrants to purchase common stock
Investment Warrants, Exercise Price	$ 1.00
Issue Date	Jan. 28, 2010
Shares	40,000
Expiration Date	Jan. 28, 2013
2007 Debt Extension Warrants [Member]
Summary of outstanding warrants to purchase common stock
Investment Warrants, Exercise Price	$ 1.00
Issue Date	Sep. 22, 2010
Shares	16,000
Expiration Date	Sep. 22, 2015
September 2010 Repricing Warrant [Member]
Summary of outstanding warrants to purchase common stock
Investment Warrants, Exercise Price	$ 1.38
Issue Date	Sep. 28, 2010
Shares	4,000
Expiration Date	Sep. 28, 2013
October 2010 Repricing Warrants [Member]
Summary of outstanding warrants to purchase common stock
Investment Warrants, Exercise Price	$ 1.38
Issue Date	Oct. 18, 2010
Shares	2,434,830
Expiration Date	Oct. 18, 2013
October 2010 Employee Warrants [Member]
Summary of outstanding warrants to purchase common stock
Investment Warrants, Exercise Price	$ 1.38
Issue Date	Oct. 15, 2010
Shares	1,440,000
Expiration Date	Oct. 15, 2013
December 2010 Employee Warrants [Member]
Summary of outstanding warrants to purchase common stock
Investment Warrants, Exercise Price	$ 1.63
Issue Date	Dec. 03, 2010
Shares	200,000
Expiration Date	Dec. 03, 2015
January 2011 Employee Warrant [Member]
Summary of outstanding warrants to purchase common stock
Investment Warrants, Exercise Price	$ 2.00
Issue Date	Jan. 21, 2011
Shares	20,000
Expiration Date	Jan. 21, 2014
February 2011 Legal Advisor Warrant [Member]
Summary of outstanding warrants to purchase common stock
Investment Warrants, Exercise Price	$ 2.00
Issue Date	Feb. 22, 2011
Shares	80,000
Expiration Date	Feb. 22, 2016
March 2011 Investor Warrants [Member]
Summary of outstanding warrants to purchase common stock
Investment Warrants, Exercise Price	$ 3.13
Issue Date	Mar. 09, 2011
Shares	617,943
Expiration Date	Mar. 09, 2016
March 2011 Investor Warrant [Member]
Summary of outstanding warrants to purchase common stock
Investment Warrants, Exercise Price	$ 3.13
Issue Date	Apr. 07, 2011
Shares	49,100
Expiration Date	Apr. 07, 2016
May 2011 Consultant Warrant [Member]
Summary of outstanding warrants to purchase common stock
Investment Warrants, Exercise Price	$ 4.05
Issue Date	May 17, 2011
Shares	20,000
Expiration Date	May 17, 2014
September 2011 Employee Warrant [Member]
Summary of outstanding warrants to purchase common stock
Investment Warrants, Exercise Price	$ 3.90
Issue Date	Sep. 12, 2011
Shares	20,000
Expiration Date	Sep. 12, 2014

X

- Definition

Exercise price of the warrants.

+ References

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Article 12

-Section 13

-Sentence Column A

+ Details

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X

- Definition

The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding and excercisable as of the balance sheet date.

+ References

No definition available.

+ Details

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X

- Definition

Issue date of share based compensation arrangement by share based payment award excluding options.

+ References

No definition available.

+ Details

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X

- Details

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X

- Definition

Date the equity-based award expires, in CCYY-MM-DD format.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (a)(2)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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