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Weighted average assumptions (Tables) | 12 Months Ended
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Dec. 31, 2014
Weighted average assumptions: |
Weighted average assumptions | The fair value of each warrant granted for equity and debt raises was determined using the Black-Scholes warrant pricing model and the following assumptions:
|  | December 31, 2014 |
Risk free interest rate |  | 1.10 % to 1.38 | %
Expected term |  | 3-4 years |
Annualized volatility |  |  | 90 | %
Expected dividends |  |  | — |

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- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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