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Income Taxes - Schedule of Income (Loss) Before Income Taxes Attributed to Geographic Locations (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Income Tax Disclosure [Abstract]      
United States $ (49,850)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic $ (18,497)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic $ (13,217)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic
Foreign (7,663)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign    
Income (loss) before income taxes $ (57,513)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest $ (18,497)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest $ (13,217)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest