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Warrant Liability (Details) (Series A Warrants [Member], USD $) | 6 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2014 | Dec. 31, 2013
Series A Warrants [Member] |  |
Assumptions used to value the Series A Warrants |  |
Expected price volatility | 115.00% | 90.00%
Expected term (in years) | 3 years 9 months 11 days | 4 years 3 months 7 days
Risk-free interest rate | 1.17% | 1.40%
Dividend yield | 0.00% | 0.00%
Weighted-average fair value of warrants | $ 0.55 | $ 0.34

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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). + 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 + Details
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