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Stockholders' Equity (Details 1)	6 Months Ended	12 Months Ended
	Jun. 30, 2012	Dec. 31, 2011
2009 Warrants [Member]
Fair value assumptions of warrants
Expected term (in years)	2 years 1 month 24 days	2 years 7 months 24 days
Estimated volatility	52.00%	74.00%
Risk-free interest rate	0.33%	0.36%
Expected dividend yield	0.00%	0.00%
2010 Warrants [Member]
Fair value assumptions of warrants
Expected term (in years)	3 years 4 months 10 days	3 years 10 months 10 days
Estimated volatility	70.00%	70.00%
Risk-free interest rate	0.41%	0.60%
Expected dividend yield	0.00%	0.00%

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- Definition

Expected dividends to be paid to holders of the underlying shares or financial instruments (expressed as a percentage of the share or instrument's price).

+ 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 (e)

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Period the instrument, asset or liability is expected to be outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 820

-SubTopic 10

-Section 50

-Paragraph 2

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Measure of dispersion, in percentage terms (for instance, the standard deviation or variance), for a given stock price.

+ 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 (e)

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Risk-free interest rate assumption used in valuing an instrument.

+ 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 (e)

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

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