Fair Value Measurements (Details)	12 Months Ended
Dec. 31, 2011	Dec. 31, 2010
Fair value assumptions and methodology for assets and liabilities
Annual dividend yield
Minimum [Member]
Fair value assumptions and methodology for assets and liabilities
Expected life (years)	29 days	6 months
Risk-free interest rate	0.08%	0.18%
Expected volatility	110.00%	117.00%
Maximum [Member]
Fair value assumptions and methodology for assets and liabilities
Expected life (years)	3 years	4 years 9 months 18 days
Risk-free interest rate	1.27%	1.90%
Expected volatility	263.00%	221.00%

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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)

-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

+ Details

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- Definition

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

+ References

+ Details

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- Definition

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

+ References

+ Details

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