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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 | 9 Months Ended | 12 Months Ended | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
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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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Sep. 30, 2012
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Sep. 30, 2011
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Dec. 31, 2011
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Dec. 31, 2010
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| Warrants [Abstract] | ||||||||||||
| Number of warrants, Outstanding | 8,676,142 | 5,624,583 | 5,624,583 | |||||||||
| Weigted average exercise price, Outstanding | $ 1.53 | $ 1.53 | $ 1.53 | $ 1.48 | ||||||||
| Number of warrants, Issued | 3,333,333 | 2,000,000 | 2,125,334 | 862,246 | 107,144 | 3,541,666 | ||||||
| Weighted average exercise price, Issued | $ 1.50 | |||||||||||
| Number of warrants, Exercised | (530,900) | (936,883) | (890,051) | (333,959) | ||||||||
| Weighted average exercise price, Exercised | $ (0.95) | |||||||||||
| Number of warrants, Expired | (156,148) | |||||||||||
| Weighted average exercise price, Expired | $ (0.82) | |||||||||||
| Number of warrants, Outstanding | 5,624,583 | 8,676,142 | 8,676,142 | 8,676,142 | 5,624,583 | |||||||
| Weigted average exercise price, Outstanding | $ 1.53 | $ 1.53 | $ 1.53 | $ 1.48 | ||||||||