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Warrants (Schedule Of Fair Value Of Warrants Issued) (Details) (USD $)
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Dec. 31, 2012
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Dec. 10, 2012
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Dec. 04, 2012
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Dec. 31, 2011
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Jun. 30, 2010
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Jun. 09, 2009
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Dec. 18, 2007
December 18, 2007 Financing [Member]
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Mar. 20, 2008
March 20, 2008 Financing [Member]
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Jun. 05, 2009
Series I Warrants [Member]
June 5, 2009 Financing [Member]
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Jun. 05, 2009
Series II Warrants [Member]
June 5, 2009 Financing [Member]
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Dec. 31, 2012
Series III Warrants [Member]
June 5, 2009 Financing [Member]
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Dec. 31, 2011
Series III Warrants [Member]
June 5, 2009 Financing [Member]
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Jun. 05, 2009
Series III Warrants [Member]
June 5, 2009 Financing [Member]
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Mar. 31, 2011
Warrants To Institutional Investors [Member]
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Dec. 31, 2012
Warrants To Institutional Investors [Member]
October 23, 2009 Financing [Member]
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Dec. 31, 2011
Warrants To Institutional Investors [Member]
October 23, 2009 Financing [Member]
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Oct. 23, 2009
Warrants To Institutional Investors [Member]
October 23, 2009 Financing [Member]
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Dec. 31, 2012
Warrants To Institutional Investors [Member]
June 30, 2010 Financing [Member]
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Dec. 31, 2011
Warrants To Institutional Investors [Member]
June 30, 2010 Financing [Member]
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Jun. 30, 2010
Warrants To Institutional Investors [Member]
June 30, 2010 Financing [Member]
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Dec. 31, 2012
Warrants To Institutional Investors [Member]
March 31, 2011 Financing [Member]
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Dec. 31, 2011
Warrants To Institutional Investors [Member]
March 31, 2011 Financing [Member]
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Mar. 31, 2011
Warrants To Institutional Investors [Member]
March 31, 2011 Financing [Member]
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Dec. 31, 2012
Warrants To Institutional Investors [Member]
December 4, 2012 Financing [Member]
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Dec. 04, 2012
Warrants To Institutional Investors [Member]
December 4, 2012 Financing [Member]
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Dec. 31, 2012
Warrants To Placement Agent [Member]
June 5, 2009 Financing [Member]
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Dec. 31, 2011
Warrants To Placement Agent [Member]
June 5, 2009 Financing [Member]
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Jun. 05, 2009
Warrants To Placement Agent [Member]
June 5, 2009 Financing [Member]
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Dec. 31, 2012
Warrants To Placement Agent [Member]
October 23, 2009 Financing [Member]
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Dec. 31, 2011
Warrants To Placement Agent [Member]
October 23, 2009 Financing [Member]
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Oct. 23, 2009
Warrants To Placement Agent [Member]
October 23, 2009 Financing [Member]
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Dec. 31, 2012
Warrants To Placement Agent [Member]
June 30, 2010 Financing [Member]
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Dec. 31, 2011
Warrants To Placement Agent [Member]
June 30, 2010 Financing [Member]
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Jun. 30, 2010
Warrants To Placement Agent [Member]
June 30, 2010 Financing [Member]
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Dec. 31, 2012
Warrants To Placement Agent [Member]
March 31, 2011 Financing [Member]
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Dec. 31, 2011
Warrants To Placement Agent [Member]
March 31, 2011 Financing [Member]
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Mar. 31, 2011
Warrants To Placement Agent [Member]
March 31, 2011 Financing [Member]
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Dec. 31, 2012
Warrants To Placement Agent [Member]
December 4, 2012 Financing [Member]
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Dec. 04, 2012
Warrants To Placement Agent [Member]
December 4, 2012 Financing [Member]
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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Fair value | $ 2,842,065 | $ 163,096 | $ 13,691,643 | $ 868,725 | $ 1,800,800 | $ 422,300 | $ 1,392,476 | $ 190,917 | $ 707,111 | $ 1,315,626 | $ 35,311 | $ 89,756 | $ 1,306,200 | $ 2,826,666 | $ 73,454 | $ 129,221 | $ 1,012,934 | $ 12,200 | $ 89,800 | $ 1,800,800 | $ 306,333 | $ 544,000 | $ 2,826,666 | $ 2,263,910 | $ 2,474,120 | $ 3,489 | $ 8,893 | $ 122,257 | $ 41 | $ 714 | $ 101,693 | $ 20 | $ 2,320 | $ 180,080 | $ 83 | $ 4,021 | $ 97,667 | $ 147,224 | $ 163,096 |