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Consolidated Statements of Comprehensive Loss - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Statement of Comprehensive Income [Abstract]      
Net loss $ (60,568) $ (52,294) $ (39,229)
Foreign currency translation adjustment 7,098 (8,507) 0
Unrealized loss on marketable securities, net of tax 0 0 (5)
Total comprehensive loss $ (53,470) $ (60,801) $ (39,234)