Annual report pursuant to Section 13 and 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 ($)
 12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Class of Warrant or Right [Line Items]    
Unrealized gain (loss) on fair value of warrants $ 5,546,049 $ (7,594,162)
Expired And Fully Exercised Warrants [Member]    
Class of Warrant or Right [Line Items]    
Unrealized gain (loss) on fair value of warrants   (855,000)
July 2013 Investor Warrants [Member]    
Class of Warrant or Right [Line Items]    
Unrealized gain (loss) on fair value of warrants 8,762 (6,702)
October 2013 Investor Warrants [Member]    
Class of Warrant or Right [Line Items]    
Unrealized gain (loss) on fair value of warrants 26,288 (22,580)
January 2014 Investor Warrants [Member]    
Class of Warrant or Right [Line Items]    
Unrealized gain (loss) on fair value of warrants 29,257 (28,543)
November 2015 Investor Warrants [Member]    
Class of Warrant or Right [Line Items]    
Unrealized gain (loss) on fair value of warrants 1,025,132 (999,550)
November 2015 Placement Agent Warrants [Member]    
Class of Warrant or Right [Line Items]    
Unrealized gain (loss) on fair value of warrants 2,501 (365,748)
March 2016 Investor Warrants [Member]    
Class of Warrant or Right [Line Items]    
Unrealized gain (loss) on fair value of warrants 537,455 (2,708,163)
September 2016 Investor Warrants [Member]    
Class of Warrant or Right [Line Items]    
Unrealized gain (loss) on fair value of warrants 720,249 (4,571,872)
June 2017 Investor Warrants [Member]    
Class of Warrant or Right [Line Items]    
Unrealized gain (loss) on fair value of warrants 1,358,540 1,691,304
June 2017 Placement Agent Warrants [Member]    
Class of Warrant or Right [Line Items]    
Unrealized gain (loss) on fair value of warrants 156,442 212,729
October 2017 Investor Warrants [Member]    
Class of Warrant or Right [Line Items]    
Unrealized gain (loss) on fair value of warrants 1,504,001 54,907
October 2017 Placement Agent Warrants [Member]    
Class of Warrant or Right [Line Items]    
Unrealized gain (loss) on fair value of warrants $ 177,422 $ 5,056