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 9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Class of Warrant or Right [Line Items]        
Unrealized (loss) gain on fair value of warrants $ (710,065) $ 3,120,500 $ 3,752,131 $ (9,047,831)
Expired And Fully Exercised Warrants [Member]        
Class of Warrant or Right [Line Items]        
Unrealized (loss) gain on fair value of warrants   7,306   (855,010)
July 2013 Investor Warrants [Member]        
Class of Warrant or Right [Line Items]        
Unrealized (loss) gain on fair value of warrants   125,686 8,762 (55,362)
October 2013 Investor Warrants [Member]        
Class of Warrant or Right [Line Items]        
Unrealized (loss) gain on fair value of warrants   135,683 26,288 (102,608)
January 2014 Investor Warrants [Member]        
Class of Warrant or Right [Line Items]        
Unrealized (loss) gain on fair value of warrants   177,900 29,257 (125,148)
November 2015 Investor Warrants [Member]        
Class of Warrant or Right [Line Items]        
Unrealized (loss) gain on fair value of warrants 5,971 797,688 860,772 (1,304,350)
November 2015 Placement Agent Warrants [Member]        
Class of Warrant or Right [Line Items]        
Unrealized (loss) gain on fair value of warrants 211 1,691 2,345 (366,694)
March 2016 Investor Warrants [Member]        
Class of Warrant or Right [Line Items]        
Unrealized (loss) gain on fair value of warrants (38,943) 356,472 401,092 (2,873,309)
September 2016 Investor Warrants [Member]        
Class of Warrant or Right [Line Items]        
Unrealized (loss) gain on fair value of warrants (109,915) 506,353 461,570 (4,807,246)
June 2017 Investor Warrants [Member]        
Class of Warrant or Right [Line Items]        
Unrealized (loss) gain on fair value of warrants (178,869) 894,076 922,342 1,277,485
June 2017 Placement Agent Warrants [Member]        
Class of Warrant or Right [Line Items]        
Unrealized (loss) gain on fair value of warrants (22,518) $ 117,645 105,822 $ 164,411
October 2017 Investor Warrants [Member]        
Class of Warrant or Right [Line Items]        
Unrealized (loss) gain on fair value of warrants (331,671)   828,906  
October 2017 Placement Agent Warrants [Member]        
Class of Warrant or Right [Line Items]        
Unrealized (loss) gain on fair value of warrants $ (34,331)   $ 104,975