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Warrants (Summary Of Shares Indexed To The Warrants) (Details)
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Mar. 31, 2014
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Jan. 21, 2014
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Dec. 31, 2013
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Mar. 31, 2011
Exercised and Expired Warrants [Member]
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Mar. 31, 2014
June 5, 2009 Financing [Member]
Series III Warrants [Member]
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Dec. 31, 2013
June 5, 2009 Financing [Member]
Series III Warrants [Member]
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Jun. 05, 2009
June 5, 2009 Financing [Member]
Series III Warrants [Member]
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Mar. 31, 2014
June 5, 2009 Financing [Member]
Warrants To Placement Agent [Member]
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Dec. 31, 2013
June 5, 2009 Financing [Member]
Warrants To Placement Agent [Member]
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Jun. 05, 2009
June 5, 2009 Financing [Member]
Warrants To Placement Agent [Member]
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Mar. 31, 2014
October 23, 2009 Financing [Member]
Warrants To Institutional Investors [Member]
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Dec. 31, 2013
October 23, 2009 Financing [Member]
Warrants To Institutional Investors [Member]
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Oct. 23, 2009
October 23, 2009 Financing [Member]
Warrants To Institutional Investors [Member]
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Mar. 31, 2014
June 30, 2010 Financing [Member]
Warrants To Institutional Investors [Member]
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Dec. 31, 2013
June 30, 2010 Financing [Member]
Warrants To Institutional Investors [Member]
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Jun. 30, 2010
June 30, 2010 Financing [Member]
Warrants To Institutional Investors [Member]
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Mar. 31, 2014
March 31, 2011 Financing [Member]
Warrants To Institutional Investors [Member]
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Dec. 31, 2013
March 31, 2011 Financing [Member]
Warrants To Institutional Investors [Member]
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Mar. 31, 2011
March 31, 2011 Financing [Member]
Warrants To Institutional Investors [Member]
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Mar. 31, 2014
December 4, 2012 Financing [Member]
Warrants To Institutional Investors [Member]
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Dec. 31, 2013
December 4, 2012 Financing [Member]
Warrants To Institutional Investors [Member]
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Dec. 04, 2012
December 4, 2012 Financing [Member]
Warrants To Institutional Investors [Member]
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Mar. 31, 2014
December 4, 2012 Financing [Member]
Warrants To Placement Agent [Member]
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Dec. 31, 2013
December 4, 2012 Financing [Member]
Warrants To Placement Agent [Member]
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Dec. 04, 2012
December 4, 2012 Financing [Member]
Warrants To Placement Agent [Member]
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Mar. 31, 2014
July 26, 2013 Financing [Member]
Warrants To Institutional Investors [Member]
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Dec. 31, 2013
July 26, 2013 Financing [Member]
Warrants To Institutional Investors [Member]
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Jul. 26, 2013
July 26, 2013 Financing [Member]
Warrants To Institutional Investors [Member]
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Mar. 31, 2014
July 26, 2013 Financing [Member]
Warrants To Placement Agent [Member]
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Dec. 31, 2013
July 26, 2013 Financing [Member]
Warrants To Placement Agent [Member]
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Jul. 26, 2013
July 26, 2013 Financing [Member]
Warrants To Placement Agent [Member]
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Mar. 31, 2014
October 16, 2013 Financing [Member]
Warrants To Institutional Investors [Member]
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Dec. 31, 2013
October 16, 2013 Financing [Member]
Warrants To Institutional Investors [Member]
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Oct. 16, 2013
October 16, 2013 Financing [Member]
Warrants To Institutional Investors [Member]
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Mar. 31, 2014
October 16, 2013 Financing [Member]
Warrants To Placement Agent [Member]
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Dec. 31, 2013
October 16, 2013 Financing [Member]
Warrants To Placement Agent [Member]
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Oct. 16, 2013
October 16, 2013 Financing [Member]
Warrants To Placement Agent [Member]
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Mar. 31, 2014
January 21, 2014 Financing [Member]
Warrants To Institutional Investors [Member]
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Jan. 21, 2014
January 21, 2014 Financing [Member]
Warrants To Institutional Investors [Member]
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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Number of shares indexed | 18,921,902 | 41,270,288 | 24,968,868 | 5,950,304 | 1,555,555 | 1,555,555 | 1,555,555 | 132,143 | 132,143 | 142,857 | 778,333 | 1,228,333 | 2,125,334 | 2,000,000 | 2,000,000 | 2,000,000 | 3,333,333 | 3,333,333 | 3,333,333 | 221,600 | 7,418,503 | 12,100,000 | 40,000 | 880,000 | 880,000 | 2,000,000 | 3,990,000 | 3,990,000 | 124,032 | 456,000 | 456,000 | 3,567,309 | 3,567,309 | 3,567,308 | 407,692 | 407,692 | 407,692 | 4,761,905 | 4,761,905 |