Annual report pursuant to Section 13 and 15(d)

Consolidated Statements of Comprehensive Loss

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Consolidated Statements of Comprehensive Loss - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Statement of Comprehensive Income [Abstract]      
Net loss $ (518,395) $ (342,978) $ (169,661)
Change in foreign currency translation adjustment 553 (594) 53
Change in net unrealized loss on marketable securities 52 289 106
Other comprehensive income (loss) 605 (305) 159
Total comprehensive loss $ (517,790) $ (343,283) $ (169,502)