Quarterly report pursuant to Section 13 or 15(d)

Warrants (Schedule Of Unrealized Gain/(Loss) On Fair Value Of Warrants) (Details)

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Warrants (Schedule Of Unrealized Gain/(Loss) On Fair Value Of Warrants) (Details) - USD ($)
 3 Months Ended 6 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Jun. 30, 2016
Jun. 30, 2015
Class of Warrant or Right [Line Items]        
Unrealized gain on fair value of warrants $ 2,118,090 $ 1,558,760 $ 2,974,045 $ 1,674,175
March 31, 2011 Warrants To Institutional Investors [Member]        
Class of Warrant or Right [Line Items]        
Unrealized gain on fair value of warrants 33 202,963 30 305,040
December 4, 2012 Warrants To Institutional Investors [Member]        
Class of Warrant or Right [Line Items]        
Unrealized gain on fair value of warrants 5,911 32,568 7,278 29,671
December 4, 2012 Warrants To Placement Agent [Member]        
Class of Warrant or Right [Line Items]        
Unrealized gain on fair value of warrants 529 5,434 1,206 5,577
July 26, 2013 Warrants To Institutional Investors [Member]        
Class of Warrant or Right [Line Items]        
Unrealized gain on fair value of warrants 63,246 289,146 93,900 264,360
July 26, 2013 Warrants To Placement Agent [Member]        
Class of Warrant or Right [Line Items]        
Unrealized gain on fair value of warrants 64 15,209 384 19,554
October 16, 2013 Warrants To Institutional Investors [Member]        
Class of Warrant or Right [Line Items]        
Unrealized gain on fair value of warrants 103,166 323,698 129,607 305,938
October 16, 2013 Warrants To Placement Agent [Member]        
Class of Warrant or Right [Line Items]        
Unrealized gain on fair value of warrants 145 48,918 970 64,097
January 21, 2014 Warrants To Institutional Investors [Member]        
Class of Warrant or Right [Line Items]        
Unrealized gain on fair value of warrants 92,428 $ 640,824 117,714 $ 679,938
November 12, 2015 Warrants To Institutional Investors [Member]        
Class of Warrant or Right [Line Items]        
Unrealized gain on fair value of warrants 875,913   1,204,626  
November 12, 2015 Warrants To Placement Agent [Member]        
Class of Warrant or Right [Line Items]        
Unrealized gain on fair value of warrants 58,276   80,160  
March 2, 2016 Warrants To Institutional Investors [Member]        
Class of Warrant or Right [Line Items]        
Unrealized gain on fair value of warrants 860,121   1,252,266  
March 2, 2016 Warrants To Placement Agent [Member]        
Class of Warrant or Right [Line Items]        
Unrealized gain on fair value of warrants $ 58,258   $ 85,904