Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements - Financial Assets and Liabilities Carried At Fair Value on Recurring Basis (Details)

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Fair Value Measurements - Financial Assets and Liabilities Carried At Fair Value on Recurring Basis (Details) - USD ($)
$ in Thousands
Sep. 30, 2015
Dec. 31, 2014
Liabilities: [Abstract]    
Contingent warrant liabilities $ 4,070 $ 31,828 [1]
Recurring [Member]    
Assets: [Abstract]    
Foreign exchange options [2]   6
Total   67,575
Liabilities: [Abstract]    
Contingent warrant liabilities 4,070 31,828
Recurring [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]    
Assets: [Abstract]    
Total   67,569
Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member]    
Assets: [Abstract]    
Foreign exchange options [2]   6
Total   6
Recurring [Member] | Significant Unobservable Inputs (Level 3) [Member]    
Liabilities: [Abstract]    
Contingent warrant liabilities 4,070 31,828
Recurring [Member] | Money Market Funds [Member]    
Assets: [Abstract]    
Money market funds [3] 12,084 67,569
Recurring [Member] | Money Market Funds [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]    
Assets: [Abstract]    
Money market funds [3] $ 12,084 $ 67,569
[1] The condensed consolidated balance sheet as of December 31, 2014 has been derived from the audited consolidated financial statements as of that date included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2014.
[2] Included in other assets
[3] Included in cash and cash equivalents