Summary of Significant Accounting Policies (Assumptions Used in Valuation of Warrants) (Details) - Stock Warrants Liability [Member] |
12 Months Ended | |
|---|---|---|
Dec. 31, 2014 |
Dec. 31, 2013 |
|
| Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] | ||
| Risk-free interest rate | 2.75% | |
| Dividend yield | 0.00% | 0.00% |
| Minimum [Member] | ||
| Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] | ||
| Risk-free interest rate | 2.23% | |
| Expected volatility | 73.00% | 71.60% |
| Expected lives | 7 years 9 months 18 days | 7 years 11 months 16 days |
| Maximum [Member] | ||
| Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] | ||
| Risk-free interest rate | 2.46% | |
| Expected volatility | 100.00% | 71.90% |
| Expected lives | 10 years | 8 years 7 months 6 days |