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, 2016
Dec. 31, 2015
Dec. 31, 2014
Class of Warrant or Right [Line Items]      
Unrealized gain (loss) on fair value of warrants $ 5,529,907 $ 3,986,727 $ (5,180,107)
Expired Warrants [Member]      
Class of Warrant or Right [Line Items]      
Unrealized gain (loss) on fair value of warrants 2,590 458,439 (1,059,400)
December 2012 Investor Warrants [Member]      
Class of Warrant or Right [Line Items]      
Unrealized gain (loss) on fair value of warrants 9,769 70,856 (4,120,103)
July 2013 Investor Warrants [Member]      
Class of Warrant or Right [Line Items]      
Unrealized gain (loss) on fair value of warrants 119,360 666,894 (1,272,731)
October 2013 Investor Warrants [Member]      
Class of Warrant or Right [Line Items]      
Unrealized gain (loss) on fair value of warrants 165,641 780,407 (940,100)
January 2014 Investor Warrants [Member]      
Class of Warrant or Right [Line Items]      
Unrealized gain (loss) on fair value of warrants 130,762 1,347,724 $ 2,212,227
November 2015 Investor Warrants [Member]      
Class of Warrant or Right [Line Items]      
Unrealized gain (loss) on fair value of warrants 1,908,875 623,125  
November 2015 Placement Agent Warrants [Member]      
Class of Warrant or Right [Line Items]      
Unrealized gain (loss) on fair value of warrants 121,593 $ 39,282  
March 2016 Investor Warrants [Member]      
Class of Warrant or Right [Line Items]      
Unrealized gain (loss) on fair value of warrants 2,060,977    
March 2016 Placement Agent Warrants [Member]      
Class of Warrant or Right [Line Items]      
Unrealized gain (loss) on fair value of warrants 134,617    
September 2016 Investor Warrants [Member]      
Class of Warrant or Right [Line Items]      
Unrealized gain (loss) on fair value of warrants 816,480    
September 2016 Placement Agent Warrants [Member]      
Class of Warrant or Right [Line Items]      
Unrealized gain (loss) on fair value of warrants $ 59,243