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Warrants (Schedule Of Unrealized Gains Losses On Fair Value Of Warrants) (Details) (USD $)
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3 Months Ended | 6 Months Ended | 131 Months Ended | 135 Months Ended | ||
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Jun. 30, 2012
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Jun. 30, 2011
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Jun. 30, 2012
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Jun. 30, 2011
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Jun. 30, 2012
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Jun. 30, 2012
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| Unrealized loss gain on fair value of warrants | $ 802,248 | $ 594,845 | $ 540,387 | $ 127,220 | $ 4,216,492 | $ 4,216,492 |
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December 18, 2007 Financing [Member]
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| Unrealized loss gain on fair value of warrants | 50,722 | |||||
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March 20, 2008 Financing [Member]
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| Unrealized loss gain on fair value of warrants | 92,704 | 160,063 | ||||
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June 5, 2009 Financing [Member]
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| Unrealized loss gain on fair value of warrants | (328,937) | |||||
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Series I Warrants [Member] | June 5, 2009 Financing [Member]
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| Unrealized loss gain on fair value of warrants | 707,111 | |||||
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Series II Warrants [Member] | June 5, 2009 Financing [Member]
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| Unrealized loss gain on fair value of warrants | (2,191,175) | |||||
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Series III Warrants [Member] | June 5, 2009 Financing [Member]
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| Unrealized loss gain on fair value of warrants | 85,711 | 142,800 | 71,089 | (48,844) | 1,287,533 | |
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Warrants To Institutional Investors [Member] | October 23, 2009 Financing [Member]
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| Unrealized loss gain on fair value of warrants | 129,220 | 64,733 | 87,089 | (177,985) | (78,438) | |
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Warrants To Institutional Investors [Member] | June 30, 2010 Financing [Member]
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| Unrealized loss gain on fair value of warrants | 92,400 | 232,200 | 74,600 | 234,200 | 1,785,600 | |
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Warrants To Institutional Investors [Member] | March 31, 2011 Financing [Member]
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| Unrealized loss gain on fair value of warrants | 478,666 | 60,666 | 294,333 | 60,666 | 2,576,999 | |
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Warrants To Placement Agent [Member] | June 5, 2009 Financing [Member]
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| Unrealized loss gain on fair value of warrants | 8,668 | 11,733 | 7,003 | (3,780) | 105,987 | |
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Warrants To Placement Agent [Member] | October 23, 2009 Financing [Member]
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| Unrealized loss gain on fair value of warrants | 1,298 | 1,467 | 570 | (111,187) | (136,082) | |
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Warrants To Placement Agent [Member] | June 30, 2010 Financing [Member]
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| Unrealized loss gain on fair value of warrants | 2,160 | 57,100 | 2,140 | 57,300 | 179,900 | |
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Warrants To Placement Agent [Member] | March 31, 2011 Financing [Member]
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| Unrealized loss gain on fair value of warrants | $ 4,125 | $ 24,146 | $ 3,563 | $ 24,146 | $ 97,209 | |