Consolidated Statements of Comprehensive Loss - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Consolidated Statements of Comprehensive Loss      
Net loss attributable to the Company $ (78,115) $ (127,080) $ (57,487)
Other comprehensive (loss) income - foreign currency translation adjustment (610) 1,947 (551)
Comprehensive loss $ (78,725) $ (125,133) $ (58,038)