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, 2019
Jun. 30, 2018
Jun. 30, 2019
Jun. 30, 2018
Class of Warrant or Right [Line Items]        
Unrealized gain on fair value of warrants $ 427,483 $ 1,095,700 $ 1,940,854 $ 4,462,196
Expired Warrants [Member]        
Class of Warrant or Right [Line Items]        
Unrealized gain on fair value of warrants   26   64,307
November 2015 Investor Warrants [Member]        
Class of Warrant or Right [Line Items]        
Unrealized gain on fair value of warrants 27,069 213,847 224,153 854,801
November 2015 Placement Agent Warrants [Member]        
Class of Warrant or Right [Line Items]        
Unrealized gain on fair value of warrants 55 556 435 2,134
March 2016 Investor Warrants [Member]        
Class of Warrant or Right [Line Items]        
Unrealized gain on fair value of warrants 32,874 112,581 147,673 440,035
September 2016 Investor Warrants [Member]        
Class of Warrant or Right [Line Items]        
Unrealized gain on fair value of warrants 72,213 137,110 290,082 571,485
June 2017 Investor Warrants [Member]        
Class of Warrant or Right [Line Items]        
Unrealized gain on fair value of warrants 129,559 278,040 517,950 1,101,211
June 2017 Placement Agent Warrants [Member]        
Class of Warrant or Right [Line Items]        
Unrealized gain on fair value of warrants 14,553 31,031 56,464 128,340
October 2017 Investor Warrants [Member]        
Class of Warrant or Right [Line Items]        
Unrealized gain on fair value of warrants 135,125 288,231 631,626 1,160,577
October 2017 Placement Agent Warrants [Member]        
Class of Warrant or Right [Line Items]        
Unrealized gain on fair value of warrants $ 16,035 $ 34,278 $ 72,471 $ 139,306