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, 2019
Dec. 31, 2018
Class of Warrant or Right [Line Items]    
Unrealized gain on fair value of warrants $ 2,265,869 $ 5,546,049
Expired Warrants [Member]    
Class of Warrant or Right [Line Items]    
Unrealized gain on fair value of warrants   64,307
November 2015 Investor Warrants [Member]    
Class of Warrant or Right [Line Items]    
Unrealized gain on fair value of warrants 234,863 1,025,132
November 2015 Placement Agent Warrants [Member]    
Class of Warrant or Right [Line Items]    
Unrealized gain on fair value of warrants 435 2,501
March 2016 Investor Warrants [Member]    
Class of Warrant or Right [Line Items]    
Unrealized gain on fair value of warrants 159,660 537,455
September 2016 Investor Warrants [Member]    
Class of Warrant or Right [Line Items]    
Unrealized gain on fair value of warrants 330,638 720,249
June 2017 Investor Warrants [Member]    
Class of Warrant or Right [Line Items]    
Unrealized gain on fair value of warrants 611,588 1,358,540
June 2017 Placement Agent Warrants [Member]    
Class of Warrant or Right [Line Items]    
Unrealized gain on fair value of warrants 64,304 156,442
October 2017 Investor Warrants [Member]    
Class of Warrant or Right [Line Items]    
Unrealized gain on fair value of warrants 777,779 1,504,001
October 2017 Placement Agent Warrants [Member]    
Class of Warrant or Right [Line Items]    
Unrealized gain on fair value of warrants $ 86,602 $ 177,422