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, 2016
Dec. 31, 2015
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Balance $ 2,739,163 $ 3,768,351
Additions 4,364,110 2,966,917
Unrealized gains, net (5,529,907) (3,986,727)
Transfers out of level 3   (9,378)
Balance $ 1,573,366 $ 2,739,163