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Warrants (Summary Of Changes In Warrants Outstanding During The Period) (Details) (USD $)
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0 Months Ended | 1 Months Ended | 12 Months Ended | |||||||||||
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Oct. 16, 2013
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Jul. 26, 2013
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Dec. 04, 2012
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Mar. 31, 2011
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Jun. 30, 2010
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Oct. 23, 2009
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Jun. 09, 2009
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Dec. 18, 2007
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Dec. 31, 2010
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Nov. 30, 2010
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May 31, 2010
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Dec. 31, 2013
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Dec. 31, 2012
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Dec. 31, 2011
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| Warrants [Abstract] | ||||||||||||||
| Number of warrants, Outstanding | 21,656,142 | 8,676,142 | ||||||||||||
| Weigted average exercise price, Outstanding | $ 0.86 | $ 0.89 | $ 1.53 | |||||||||||
| Number of warrants, Issued | 3,567,309 | 3,990,000 | 10,521,739 | 3,333,333 | 2,000,000 | 2,125,334 | 862,246 | 107,144 | 8,421,001 | 12,980,000 | ||||
| Weighted average exercise price, Issued | $ 0.59 | $ 0.47 | ||||||||||||
| Number of warrants, Exercised | (530,900) | (936,883) | (890,051) | (4,681,497) | ||||||||||
| Weighted average exercise price, Exercised | $ 0.47 | |||||||||||||
| Number of warrants, Expired | (426,778) | |||||||||||||
| Weighted average exercise price, Expired | $ 1.67 | |||||||||||||
| Number of warrants, Outstanding | 24,968,868 | 21,656,142 | 8,676,142 | |||||||||||
| Weigted average exercise price, Outstanding | $ 0.86 | $ 0.89 | $ 1.53 | |||||||||||