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Stock-Based Compensation (Schedule Of Assumptions Made In Calculating The Fair Value Of Options) (Details)
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12 Months Ended | |
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Dec. 31, 2013
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Dec. 31, 2012
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| Stock-Based Compensation [Abstract] | ||
| Expected dividend yield | 0.00% | 0.00% |
| Expected volatility, minimum | 94.00% | 98.00% |
| Expected volatility, maximum | 96.00% | 101.00% |
| Risk free interest rate, minimum | 0.75% | 0.62% |
| Risk free interest rate, maximum | 1.75% | 0.89% |
| Expected term (in years) | 5 years | 5 years |