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8. Derivative liability (Tables) | 12 Months Ended
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Dec. 31, 2014
Derivative Liability [Abstract] |
Schedule of derivative liabilities |
|  | Derivative Liabilities, Fair Value of Warrants |
|  | January 15 |  |  | December 31, |
|  | 2013 |  |  | 2012 |
Risk-free interest rate |  |  | 0.12% |  |  |  | 0.02% |
Expected volatility |  |  | 92% |  |  |  | 165% |
Expected life (in years) |  |  | 0.75 - 1.00 |  |  |  | 0.04 |
Expected dividend yield |  |  | 0% |  |  |  | 0% |
Fair Value: |  |  |  |  |  |  |  |
2009 Warrants |  |  | 3,441,752 |  |  |  | 3,221,138 |
Total Fair Value |  | $ | 3,441,752 |  |  | $ | 3,221,138 |

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- Definition Tabular disclosure of the inputs and valuation techniques used to measure fair value, and a discussion of changes in valuation techniques and related inputs, if any, used to measure similar assets in prior periods (non-recurring basis) by class of asset or liability. + 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 (bbb) -URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19207-110258 + Details
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