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Business and Presentation (Details 1)
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12 Months Ended | |
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Dec. 31, 2014
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Dec. 31, 2013
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||
| Risk free rate, Minimum | 0.10% | 0.40% |
| Risk free rate, Maximum | 1.70% | 1.40% |
| Weighted average expected years until exercise | 6 years 3 months 18 days | 5 years 10 months 24 days |
| Expected stock volatility, Minimum | 118.00% | 96.00% |
| Expected stock volatility, Maximum | 127.00% | 135.00% |
| Dividend yield | 0.00% | 0.00% |