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) (USD $)
 6 Months Ended 12 Months Ended
Jun. 30, 2014
Dec. 31, 2013
June 5, 2009 Financing [Member]
    
Class of Warrant or Right [Line Items]    
Trading market prices   $ 0.51
Estimated future volatility   109.00%
Estimated future risk-free rate   0.13%
Equivalent volatility, minimum   43.00%
Equivalent volatility, maximum   45.00%
Equivalent risk-free rate, minimum   0.05%
Equivalent risk-free rate, maximum   0.06%
October 23, 2009 Financing [Member]
    
Class of Warrant or Right [Line Items]    
Trading market prices $ 0.87 $ 0.51
Estimated future volatility 109.00% 109.00%
Estimated future risk-free rate 0.06% 0.13%
Equivalent volatility 43.00% 57.00%
Equivalent risk-free rate 0.03% 0.07%
June 30, 2010 Financing [Member]
    
Class of Warrant or Right [Line Items]    
Trading market prices   $ 0.51
Estimated future volatility   109.00%
Estimated future risk-free rate   0.13%
Equivalent volatility   49.00%
Equivalent risk-free rate   0.06%
March 31, 2011 Financing [Member]
    
Class of Warrant or Right [Line Items]    
Trading market prices $ 0.87 $ 0.51
Estimated future volatility 109.00% 109.00%
Estimated future risk-free rate 1.05% 1.58%
Equivalent volatility 89.00% 71.00%
Equivalent risk-free rate 0.20% 0.27%
December 4, 2012 Financing [Member]
    
Class of Warrant or Right [Line Items]    
Trading market prices $ 0.87 $ 0.51
Estimated future volatility 109.00% 109.00%
Estimated future risk-free rate, minimum 0.85% 1.58%
Estimated future risk-free rate, maximum 1.98% 2.72%
Equivalent volatility, minimum 89.00% 69.00%
Equivalent volatility, maximum 90.00% 73.00%
Equivalent risk-free rate, minimum 0.16% 0.22%
Equivalent risk-free rate, maximum 0.38% 0.40%
July 26, 2013 Financing [Member]
    
Class of Warrant or Right [Line Items]    
Trading market prices $ 0.87 $ 0.51
Equivalent volatility, minimum 88.00% 69.00%
Equivalent volatility, maximum 89.00% 77.00%
Equivalent risk-free rate, minimum 0.16% 0.22%
Equivalent risk-free rate, maximum 0.49% 0.62%
October 16, 2013 Financing [Member]
    
Class of Warrant or Right [Line Items]    
Trading market prices $ 0.87 $ 0.51
Equivalent volatility, minimum 89.00% 69.00%
Equivalent volatility, maximum   76.00%
Equivalent risk-free rate, minimum 0.16% 0.20%
Equivalent risk-free rate, maximum 0.53% 0.52%
January 21, 2014 Financing [Member]
    
Class of Warrant or Right [Line Items]    
Trading market prices $ 0.87  
Equivalent volatility 87.00%  
Equivalent risk-free rate 0.57%