Warrants (Schedule Of Assumptions Used In Calculating Fair Value Of Warrants) (Details) (USD $)
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3 Months Ended | 12 Months Ended |
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Mar. 31, 2015
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Dec. 31, 2014
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Warrants [Abstract] | ||
Trading market prices | $ 0.73rnn_InvestmentWarrantsFairValueAssumptionsTradingMarketPrices | $ 0.70rnn_InvestmentWarrantsFairValueAssumptionsTradingMarketPrices |
Estimated future volatility | 107.00%rnn_InvestmentWarrantsFairValueAssumptionsEstimatedFutureVolatilityRate | 108.00%rnn_InvestmentWarrantsFairValueAssumptionsEstimatedFutureVolatilityRate |
Estimated future risk-free rate, minimum | 0.56%rnn_InvestmentWarrantsFairValueAssumptionsRiskFreeInterestRateMinimum | 0.74%rnn_InvestmentWarrantsFairValueAssumptionsRiskFreeInterestRateMinimum |
Estimated future risk-free rate, maximum | 1.68%rnn_InvestmentWarrantsFairValueAssumptionsRiskFreeInterestRateMaximum | 1.90%rnn_InvestmentWarrantsFairValueAssumptionsRiskFreeInterestRateMaximum |
Equivalent volatility, minimum | 51.00%rnn_InvestmentWarrantsFairValueAssumptionsEquivalentVolatilityMinimum | 65.00%rnn_InvestmentWarrantsFairValueAssumptionsEquivalentVolatilityMinimum |
Equivalent volatility, maximum | 76.00%rnn_InvestmentWarrantsFairValueAssumptionsEquivalentVolatilityRateMaximum | 78.00%rnn_InvestmentWarrantsFairValueAssumptionsEquivalentVolatilityRateMaximum |
Equivalent risk-free rate, minimum | 0.16%rnn_InvestmentWarrantsFairValueAssumptionsEquivalentRiskFreeRateMinimum | 0.18%rnn_InvestmentWarrantsFairValueAssumptionsEquivalentRiskFreeRateMinimum |
Equivalent risk-free rate, maximum | 0.50%rnn_InvestmentWarrantsFairValueAssumptionsEquivalentRiskFreeRateMaximum | 0.63%rnn_InvestmentWarrantsFairValueAssumptionsEquivalentRiskFreeRateMaximum |
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Investment Warrants, Fair Value Assumptions, Equivalent Risk Free Rate, Maximum No definition available.
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Investment Warrants, Fair Value Assumptions, Equivalent Risk Free Rate, Minimum No definition available.
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Investment Warrants, Fair Value Assumptions, Equivalent Volatility, Minimum No definition available.
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Investment Warrants, Fair Value Assumptions, Equivalent Volatility Rate, Maximum No definition available.
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Investment Warrants Fair Value Assumptions Estimated Future Volatility Rate No definition available.
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Investment Warrants, Fair Value Assumptions, Risk Free Interest Rate, Maximum No definition available.
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Investment Warrants, Fair Value Assumptions, Risk Free Interest Rate, Minimum No definition available.
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Investment Warrants, Fair Value Assumptions, Trading Market Prices No definition available.
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