Derivative liability (Details)	6 Months Ended	12 Months Ended
Jun. 30, 2012	Dec. 31, 2011
Minimum [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Expected term	3 months	6 months
Volatility	208.60%	204.70%
Risk-free interest rate	0.09%	0.06%
Dividend yield	0	0
Maximum [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Expected term	3 years	3 years
Volatility	263.40%	315.20%
Risk-free interest rate	0.41%	0.36%
Dividend yield	0	0

Amount of dividends expected to be paid to holders of the underlying shares or contracted instruments over the term of the instruments life.

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

+ Details

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- Definition

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

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- Definition

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

+ References

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- Definition

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

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