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, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
Class of Warrant or Right [Line Items]        
Unrealized gain (loss) on fair value of warrants $ 5,521,249 $ 2,118,090 $ (12,168,331) $ 2,974,045
Expired Warrants [Member]        
Class of Warrant or Right [Line Items]        
Unrealized gain (loss) on fair value of warrants   771   2,590
December 2012 Investor Warrants [Member]        
Class of Warrant or Right [Line Items]        
Unrealized gain (loss) on fair value of warrants 35,454 5,911 (7,267) 7,278
July 2013 Investor Warrants [Member]        
Class of Warrant or Right [Line Items]        
Unrealized gain (loss) on fair value of warrants 368,332 63,246 (181,048) 93,900
October 2013 Investor Warrants [Member]        
Class of Warrant or Right [Line Items]        
Unrealized gain (loss) on fair value of warrants 438,919 103,166 (238,291) 129,607
January 2014 Investor Warrants [Member]        
Class of Warrant or Right [Line Items]        
Unrealized gain (loss) on fair value of warrants 778,762 92,428 (303,048) 117,714
November 2015 Investor Warrants [Member]        
Class of Warrant or Right [Line Items]        
Unrealized gain (loss) on fair value of warrants 2,017,712 875,913 (2,102,038) 1,204,626
November 2015 Placement Agent Warrants [Member]        
Class of Warrant or Right [Line Items]        
Unrealized gain (loss) on fair value of warrants (96,560) 58,276 (368,385) 80,160
March 2016 Investor Warrants [Member]        
Class of Warrant or Right [Line Items]        
Unrealized gain (loss) on fair value of warrants 702,730 860,121 (3,229,781) 1,252,266
March 2016 Placement Agent Warrants [Member]        
Class of Warrant or Right [Line Items]        
Unrealized gain (loss) on fair value of warrants (82,867) $ 58,258 (351,899) $ 85,904
September 2016 Investor Warrants [Member]        
Class of Warrant or Right [Line Items]        
Unrealized gain (loss) on fair value of warrants 928,592   (5,313,599)  
September 2016 Placement Agent Warrants [Member]        
Class of Warrant or Right [Line Items]        
Unrealized gain (loss) on fair value of warrants     (503,150)  
June 2017 Investor Warrants [Member]        
Class of Warrant or Right [Line Items]        
Unrealized gain (loss) on fair value of warrants 383,409   383,409  
June 2017 Placement Agent Warrants [Member]        
Class of Warrant or Right [Line Items]        
Unrealized gain (loss) on fair value of warrants $ 46,766   $ 46,766