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7. Derivative Liability (Details) (USD $) |  |  | 0 Months Ended | 12 Months Ended |  |  |  |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Dec. 31, 2013 | Dec. 31, 2012 | Jan. 15, 2013 Warrants | Dec. 31, 2012 Warrants | Dec. 31, 2011 Warrants | Jan. 15, 2013 Warrants 2009 Summer Warrants | Dec. 31, 2012 Warrants 2009 Summer Warrants | Dec. 31, 2011 Warrants 2009 Summer Warrants | Jan. 15, 2013 Warrants 2009 Wellfleet Warrants | Dec. 31, 2012 Warrants 2009 Wellfleet Warrants | Dec. 31, 2011 Warrants 2009 Wellfleet Warrants | Jan. 15, 2013 Warrants 2009 Fall Warrants | Dec. 31, 2012 Warrants 2009 Fall Warrants | Dec. 31, 2011 Warrants 2009 Fall Warrants
Risk-free interest rate |  |  | 0.12% | 0.02% | 0.02% |  |  |  |  |  |  |  |  |
Expected volatility |  |  | 92.00% | 165.00% | 165.00% |  |  |  |  |  |  |  |  |
Expected life (in years) |  |  | 0.75 - 1.00 | 0.04 | 0.04 |  |  |  |  |  |  |  |  |
Expected dividend yield |  |  | 0.00% | 0.00% | 0.00% |  |  |  |  |  |  |  |  |
Total Fair Value | $ 0 | $ 3,221,138 | $ 3,441,752 | $ 3,221,138 | $ 1,643,139 | $ 0 | $ 0 | $ 332,998 | $ 0 | $ 0 | $ 17,807 | $ 3,441,752 | $ 3,221,138 | $ 1,292,334

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