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Warrants (Schedule Of Assumptions Used In Calculating Fair Value Of Warrants) (Details) (USD $)
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39 Months Ended | 0 Months Ended | 3 Months Ended | 12 Months Ended | 0 Months Ended | 3 Months Ended | 12 Months Ended | 0 Months Ended | 3 Months Ended | 12 Months Ended | 0 Months Ended | 3 Months Ended | 12 Months Ended | 0 Months Ended | 3 Months Ended | 12 Months Ended | 0 Months Ended | 3 Months Ended | 12 Months Ended | 0 Months Ended | 3 Months Ended | 12 Months Ended | 0 Months Ended | 3 Months Ended |
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Mar. 31, 2011
Exercised and Expired Warrants [Member]
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Jun. 05, 2009
June 5, 2009 Financing [Member]
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Mar. 31, 2014
June 5, 2009 Financing [Member]
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Dec. 31, 2013
June 5, 2009 Financing [Member]
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Oct. 23, 2009
October 23, 2009 Financing [Member]
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Mar. 31, 2014
October 23, 2009 Financing [Member]
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Dec. 31, 2013
October 23, 2009 Financing [Member]
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Jun. 30, 2010
June 30, 2010 Financing [Member]
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Mar. 31, 2014
June 30, 2010 Financing [Member]
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Dec. 31, 2013
June 30, 2010 Financing [Member]
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Mar. 31, 2011
March 31, 2011 Financing [Member]
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Mar. 31, 2014
March 31, 2011 Financing [Member]
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Dec. 31, 2013
March 31, 2011 Financing [Member]
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Dec. 04, 2012
December 4, 2012 Financing [Member]
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Mar. 31, 2014
December 4, 2012 Financing [Member]
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Dec. 31, 2013
December 4, 2012 Financing [Member]
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Jul. 26, 2013
July 26, 2013 Financing [Member]
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Mar. 31, 2014
July 26, 2013 Financing [Member]
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Dec. 31, 2013
July 26, 2013 Financing [Member]
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Oct. 16, 2013
October 16, 2013 Financing [Member]
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Mar. 31, 2014
October 16, 2013 Financing [Member]
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Dec. 31, 2013
October 16, 2013 Financing [Member]
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Jan. 21, 2014
January 21, 2014 Financing [Member]
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Mar. 31, 2014
January 21, 2014 Financing [Member]
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| Trading market prices | $ 1.14 | $ 1.08 | $ 0.51 | $ 0.69 | $ 1.08 | $ 0.51 | $ 1.43 | $ 1.08 | $ 0.51 | $ 1.18 | $ 1.08 | $ 0.51 | $ 1.08 | $ 0.51 | $ 0.53 | $ 1.08 | $ 0.51 | $ 0.49 | $ 1.08 | $ 0.51 | $ 1.09 | $ 1.08 | ||
| Trading market prices, minimum | $ 1.75 | $ 0.30 | ||||||||||||||||||||||
| Trading market prices, maximum | $ 2.14 | $ 0.33 | ||||||||||||||||||||||
| Estimated future volatility, minimum | 142.00% | |||||||||||||||||||||||
| Estimated future volatility | 100.00% | 110.00% | 109.00% | 100.00% | 110.00% | 109.00% | 100.00% | 110.00% | 109.00% | 100.00% | 110.00% | 109.00% | 100.00% | 110.00% | 109.00% | |||||||||
| Estimated future volatility, maximum | 143.00% | |||||||||||||||||||||||
| Estimated future risk-free rate, minimum | 1.95% | 0.63% | 2.63% | 1.32% | 0.52% | 1.82% | 1.58% | |||||||||||||||||
| Estimated future risk-free rate | 0.13% | 0.13% | 0.13% | 0.13% | 1.78% | 0.13% | 0.13% | 1.82% | 1.58% | |||||||||||||||
| Estimated future risk-free rate, maximum | 3.27% | 4.31% | 3.80% | 3.64% | 1.065% | 2.56% | 2.72% | |||||||||||||||||
| Equivalent volatility, minimum | 97.00% | 103.00% | 89.00% | 43.00% | 98.00% | 79.00% | 88.00% | 100.00% | 69.00% | 78.00% | 100.00% | 69.00% | 81.00% | 100.00% | 69.00% | |||||||||
| Equivalent volatility | 119.00% | 57.00% | 98.00% | 89.00% | 49.00% | 98.00% | 71.00% | 98.00% | 99.00% | |||||||||||||||
| Equivalent volatility, maximum | 106.00% | 117.00% | 90.00% | 45.00% | 99.00% | 96.00% | 90.00% | 106.00% | 73.00% | 80.00% | 102.00% | 77.00% | 83.00% | 101.00% | 76.00% | |||||||||
| Equivalent risk-free rate, minimum | 1.31% | 0.20% | 0.05% | 0.93% | 0.39% | 0.22% | 0.20% | 0.22% | 0.20% | 0.20% | 0.22% | 0.21% | 0.20% | 0.20% | ||||||||||
| Equivalent risk-free rate | 0.02% | 0.05% | 0.07% | 0.59% | 0.03% | 0.06% | 0.23% | 0.27% | 0.62% | 0.63% | ||||||||||||||
| Equivalent risk-free rate, maximum | 3.26% | 1.44% | 0.06% | 1.16% | 1.09% | 0.31% | 0.43% | 0.40% | 0.48% | 0.54% | 0.62% | 0.55% | 0.58% | 0.52% | ||||||||||
| Estimated additional shares to be issued upon dilutive event, minimum | 7,479 | |||||||||||||||||||||||
| Estimated additional shares to be issued upon dilutive event, maximum | 98,838 |