Annual report pursuant to Section 13 and 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
 12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Warrants [Abstract]    
Trading market prices $ 0.36 $ 0.70
Estimated future volatility 105.00% 108.00%
Dividend
Estimated future risk-free rate, minimum 0.82% 0.74%
Estimated future risk-free rate, maximum 2.38% 1.90%
Equivalent volatility, minimum 44.00% 65.00%
Equivalent volatility, maximum 65.00% 78.00%
Equivalent risk-free rate, minimum 0.22% 0.18%
Equivalent risk-free rate, maximum 1.11% 0.63%