Quarterly report pursuant to Section 13 or 15(d)

Warrants (Schedule Of Assumptions Used In Calculating Fair Value Of Warrants) (Details)

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Warrants (Schedule Of Assumptions Used In Calculating Fair Value Of Warrants) (Details) - $ / shares
 9 Months Ended 12 Months Ended
Sep. 30, 2019
Dec. 31, 2018
Class of Warrant or Right [Line Items]    
Trading market prices $ 2.05 $ 11.16
Estimated future volatility 104.00% 105.00%
Dividend
Fundamental transaction likelihood 50.00% 5.00%
Fundamental transaction timing 2020-03  
Fundamental transaction timing   End of warrant term
Minimum [Member]    
Class of Warrant or Right [Line Items]    
Estimated future risk-free rate 1.42% 2.35%
Equivalent volatility 98.00% 99.00%
Equivalent risk-free rate 1.70% 2.51%
Maximum [Member]    
Class of Warrant or Right [Line Items]    
Estimated future risk-free rate 1.57% 2.53%
Equivalent volatility 117.00% 104.00%
Equivalent risk-free rate 1.80% 2.55%