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Warrants (Schedule Of Fair Value Of Warrants Issued) (Details) (USD $)
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Jun. 30, 2014
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Dec. 31, 2013
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|---|---|---|
| Class of Warrant or Right [Line Items] | ||
| Fair value | $ 6,583,403 | $ 5,034,058 |
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Series III Warrants [Member] | June 5, 2009 Financing [Member]
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| Class of Warrant or Right [Line Items] | ||
| Fair value | 11 | |
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Warrants To Institutional Investors [Member] | October 23, 2009 Financing [Member]
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| Class of Warrant or Right [Line Items] | ||
| Fair value | 32,112 | 19,689 |
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Warrants To Institutional Investors [Member] | June 30, 2010 Financing [Member]
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| Class of Warrant or Right [Line Items] | ||
| Fair value | 10 | |
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Warrants To Institutional Investors [Member] | March 31, 2011 Financing [Member]
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| Class of Warrant or Right [Line Items] | ||
| Fair value | 1,059,450 | 311,360 |
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Warrants To Institutional Investors [Member] | December 4, 2012 Financing [Member]
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| Class of Warrant or Right [Line Items] | ||
| Fair value | 139,968 | 2,124,444 |
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Warrants To Institutional Investors [Member] | July 26, 2013 Financing [Member]
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| Class of Warrant or Right [Line Items] | ||
| Fair value | 1,214,938 | 1,148,390 |
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Warrants To Institutional Investors [Member] | October 16, 2013 Financing [Member]
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| Class of Warrant or Right [Line Items] | ||
| Fair value | 1,444,796 | 1,051,454 |
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Warrants To Institutional Investors [Member] | January 21, 2014 Financing [Member]
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| Class of Warrant or Right [Line Items] | ||
| Fair value | 2,413,567 | |
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Warrants To Placement Agent [Member] | June 5, 2009 Financing [Member]
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| Class of Warrant or Right [Line Items] | ||
| Fair value | 1 | |
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Warrants To Placement Agent [Member] | December 4, 2012 Financing [Member]
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| Class of Warrant or Right [Line Items] | ||
| Fair value | 23,605 | 222,286 |
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Warrants To Placement Agent [Member] | July 26, 2013 Financing [Member]
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| Class of Warrant or Right [Line Items] | ||
| Fair value | 60,294 | 83,808 |
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Warrants To Placement Agent [Member] | October 16, 2013 Financing [Member]
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| Class of Warrant or Right [Line Items] | ||
| Fair value | $ 194,673 | $ 72,605 |