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
Mar. 31, 2019
Mar. 31, 2018
Class of Warrant or Right [Line Items]    
Unrealized gain on fair value of warrants $ 1,513,371 $ 3,366,496
Expired Warrants [Member]    
Class of Warrant or Right [Line Items]    
Unrealized gain on fair value of warrants   64,281
November 2015 Investor Warrants [Member]    
Class of Warrant or Right [Line Items]    
Unrealized gain on fair value of warrants 197,084 640,954
November 2015 Placement Agent Warrants [Member]    
Class of Warrant or Right [Line Items]    
Unrealized gain on fair value of warrants 380 1,578
March 2016 Investor Warrants [Member]    
Class of Warrant or Right [Line Items]    
Unrealized gain on fair value of warrants 114,799 327,454
September 2016 Investor Warrants [Member]    
Class of Warrant or Right [Line Items]    
Unrealized gain on fair value of warrants 217,869 434,375
June 2017 Investor Warrants [Member]    
Class of Warrant or Right [Line Items]    
Unrealized gain on fair value of warrants 388,391 823,171
June 2017 Placement Agent Warrants [Member]    
Class of Warrant or Right [Line Items]    
Unrealized gain on fair value of warrants 41,911 97,309
October 2017 Investor Warrants [Member]    
Class of Warrant or Right [Line Items]    
Unrealized gain on fair value of warrants 496,501 872,346
October 2017 Placement Agent Warrants [Member]    
Class of Warrant or Right [Line Items]    
Unrealized gain on fair value of warrants $ 56,436 $ 105,028