Warrants (Schedule Of Assumptions Used In Calculating Fair Value Of Warrants) (Details) - $ / shares |
3 Months Ended | 12 Months Ended |
|---|---|---|
Mar. 31, 2018 |
Dec. 31, 2017 |
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| Class of Warrant or Right [Line Items] | ||
| Trading market prices | $ 1.51 | $ 2.02 |
| Estimated future volatility | 103.00% | 104.00% |
| Dividend | ||
| Minimum [Member] | ||
| Class of Warrant or Right [Line Items] | ||
| Estimated future risk-free rate | 2.56% | 2.14% |
| Equivalent volatility | 37.00% | 85.00% |
| Equivalent risk-free rate | 1.44% | 1.30% |
| Maximum [Member] | ||
| Class of Warrant or Right [Line Items] | ||
| Estimated future risk-free rate | 2.73% | 2.45% |
| Equivalent volatility | 91.00% | 104.00% |
| Equivalent risk-free rate | 2.25% | 1.89% |
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- Definition Investment Warrants, Fair Value Assumptions, Equivalent Risk Free Rate No definition available.
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- Definition Investment Warrants, Fair Value Assumptions, Equivalent Volatility Rate No definition available.
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- Definition Investment Warrants, Fair Value Assumptions, Estimated Dividend No definition available.
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- Definition Investment Warrants Fair Value Assumptions Estimated Future Volatility Rate No definition available.
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- Definition Investment Warrants, Fair Value Assumptions, Risk Free Interest Rate No definition available.
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- Definition Investment Warrants, Fair Value Assumptions, Trading Market Prices No definition available.
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
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