Annual report pursuant to Section 13 and 15(d)

Fair Value Measurements (Reconciliation Of Changes In The Fair Value Of Liabilities) (Details)

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Fair Value Measurements (Reconciliation Of Changes In The Fair Value Of Liabilities) (Details) - Warrant Liabilities [Member] - USD ($)
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Balance at January 1 $ 3,768,351 $ 5,034,058
Additions 2,966,917 3,691,429
Unrealized gains, net (3,986,727) 5,180,107
Transfers out of level 3 (9,378) (10,137,243)
Balance at December 31 $ 2,739,163 $ 3,768,351