Fair Value of Financial Assets and Liabilities - Derivative Instruments (Details 2) (USD $)	3 Months Ended	12 Months Ended
Mar. 31, 2015	Dec. 31, 2014
Fair Value Assumptions and Methodology for Assets and Liabilities [Line Items]
Volatility	96.00%	91.00%
Expected term (years)	1 year	1 year 3 months
Risk-free interest rate	0.26%	0.36%
Dividend yield	0.00%	0.00%
Exercise price	$ 0.14	$ 0.14
Common stock closing price	$ 0.30us-gaap_SharePrice	$ 0.21us-gaap_SharePrice
2011 [Member]
Fair Value Assumptions and Methodology for Assets and Liabilities [Line Items]
Volatility	105.00%	155.00%
Expected term (years)	1 year 8 months 23 days	1 year 11 months 23 days
Risk-free interest rate	0.48%	0.67%
Dividend yield	0.00%	0.00%
Exercise price	$ 0.46	$ 0.46
Common stock closing price	$ 0.30	$ 0.21
June 2013 [Member]
Fair Value Assumptions and Methodology for Assets and Liabilities [Line Items]
Volatility	141.00%	155.00%
Expected term (years)	3 years 2 months 26 days	3 years 5 months 26 days
Risk-free interest rate	0.95%	1.23%
Dividend yield	0.00%	0.00%
Exercise price	$ 0.14	$ 0.14
Common stock closing price	$ 0.30	$ 0.21
July 2013
Fair Value Assumptions and Methodology for Assets and Liabilities [Line Items]
Volatility	141.00%	155.00%
Expected term (years)	3 years 3 months 14 days	3 years 6 months 14 days
Risk-free interest rate	0.96%	1.25%
Dividend yield	0.00%	0.00%
Exercise price	$ 0.14	$ 0.14
Common stock closing price	$ 0.30	$ 0.21
December 2013 [Member]
Fair Value Assumptions and Methodology for Assets and Liabilities [Line Items]
Volatility	152.00%	151.00%
Expected term (years)	3 years 8 months 23 days	3 years 11 months 23 days
Risk-free interest rate	1.07%	1.37%
Dividend yield	0.00%	0.00%
Exercise price	$ 0.17	$ 0.25
Common stock closing price	$ 0.30	$ 0.21
March 2015 [Member]
Fair Value Assumptions and Methodology for Assets and Liabilities [Line Items]
Volatility	141.00%
Expected term (years)	4 years 11 months 16 days
Risk-free interest rate	1.36%
Dividend yield	0.00%
Exercise price	$ 0.215
Common stock closing price	$ 0.30

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Agreed upon price for the exchange of the underlying asset.

+ 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=36462937&loc=d3e19207-110258

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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).

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

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- Definition

Price of a single share of a number of saleable stocks of a company.

+ References

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