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8. Derivative liability | 12 Months Ended
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Dec. 31, 2014
Derivative Liability [Abstract] |
8. Derivative liability | In 2009 and 2010, in connection with certain convertible note offerings, the Company granted warrants to purchase an aggregate of 8,522,500 shares of the Company’s common stock. The warrants are initially exercisable at $0.30 per share with exercise prices that may fluctuate based on the occurrence of future offerings or events. Pursuant to current accounting pronouncements, instruments which do not have fixed settlement provisions are deemed to be derivative instruments. The FASB’s guidance requires the fair value of these liabilities be re-measured at the end of every reporting period. As a result, these warrants were not considered indexed to the Company’s own stock. The Company characterized the fair value of these warrants as derivative liabilities upon issuance and re-measured every reporting period with the change in value reported in the accompanying statement of operations. During the year ended December 31, 2012, the Company recorded a loss of $4,023,094 due to the change in the fair value of the derivatives. Furthermore, approximately 4 million warrants expired or were exercised and as a result, the Company recognized a gain of $2,445,095 due to the extinguishment of the derivative liabilities resulting from the expiration or exercise of these warrants. At December 31, 2012, a total of 4.4 million warrants remained outstanding with a fair value of $3,221,138. In January 2013, the remaining 4.4 million warrants expired or were exercised at which time the warrants had a fair value of $3,441,752, which resulted in a loss of $220,614 due to the change in the fair value of the derivative liability. Furthermore, as a result of the exercise and expiration of these warrants, the Company recorded a gain of $3,441,752 due to the extinguishment of the corresponding derivative liability. There were no similar instruments issued or outstanding in 2014. The derivative liabilities were valued using a probability weighted average series of Black-Scholes Option Pricing models as a valuation technique, which approximates the Monte Carlo and other binominal valuation techniques with the following assumptions:
|  | 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 |
The risk-free interest rate is based on the yield available on U.S. Treasury securities. The Company estimates volatility based on the historical volatility of its common stock. The expected life warrants are based on the expiration date of the related warrants. The expected dividend yield was based on the fact that the Company has not paid dividends to stockholders in the past nor is it expected to pay any dividends in the foreseeable future.

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- Definition The entire disclosure for derivative instruments and hedging activities including, but not limited to, risk management strategies, non-hedging derivative instruments, assets, liabilities, revenue and expenses, and methodologies and assumptions used in determining the amounts. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 30 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=35736893&loc=d3e80748-113994 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4A -URI http://asc.fasb.org/extlink&oid=35706170&loc=SL5618551-113959 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4K -URI http://asc.fasb.org/extlink&oid=35706170&loc=SL5708775-113959 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 25 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6886632&loc=d3e76258-113986 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4E -URI http://asc.fasb.org/extlink&oid=35706170&loc=SL5624181-113959 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6441202&loc=d3e80720-113993 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4H -URI http://asc.fasb.org/extlink&oid=35706170&loc=SL5624258-113959 Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4B -URI http://asc.fasb.org/extlink&oid=35706170&loc=SL5624163-113959 Reference 9: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(n)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 10: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4J -URI http://asc.fasb.org/extlink&oid=35706170&loc=SL5708773-113959 Reference 11: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 30 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=35736893&loc=d3e80784-113994 Reference 12: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4D -URI http://asc.fasb.org/extlink&oid=35706170&loc=SL5624177-113959 Reference 13: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=35706170&loc=d3e41620-113959 Reference 14: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1A -URI http://asc.fasb.org/extlink&oid=35706170&loc=SL5579245-113959 Reference 15: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1B -URI http://asc.fasb.org/extlink&oid=35706170&loc=SL5580258-113959 Reference 16: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=35706170&loc=SL5579240-113959 Reference 17: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=35706170&loc=d3e41641-113959 Reference 18: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=35706170&loc=d3e41638-113959 Reference 19: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -URI http://asc.fasb.org/extlink&oid=35706170&loc=SL5624171-113959 + Details
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