Warrants (Schedule Of Assumptions Used In Calculating Fair Value Of Warrants) (Details) - $ / shares |
3 Months Ended | 12 Months Ended | |
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Mar. 31, 2020 |
Dec. 31, 2019 |
Dec. 31, 2018 |
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Class of Warrant or Right [Line Items] | |||
Trading market prices | $ 1.80 | $ 1.91 | $ 11.16 |
Estimated future volatility | 100.00% | 102.00% | 105.00% |
Dividend | |||
Fundamental transaction likelihood | 50.00% | 50.00% | 5.00% |
Fundamental transaction timing | 2020-07 | 2020-04 | |
Fundamental transaction timing | End of warrant term | ||
Minimum [Member] | |||
Class of Warrant or Right [Line Items] | |||
Estimated future risk-free rate | 0.20% | 1.57% | 2.35% |
Equivalent volatility | 113.00% | 85.00% | 99.00% |
Equivalent risk-free rate | 0.13% | 1.57% | 2.51% |
Maximum [Member] | |||
Class of Warrant or Right [Line Items] | |||
Estimated future risk-free rate | 0.41% | 1.72% | 2.53% |
Equivalent volatility | 129.00% | 94.00% | 104.00% |
Equivalent risk-free rate | 0.19% | 1.59% | 2.55% |
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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 Additional Shares Issued Upon Dilutive Event 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 Warrant Fundamental Transaction Timing, Date No definition available.
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- Definition Warrant Fundamental Transaction Timing, Description 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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