Consolidated Statements of Comprehensive Loss - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Statement of Comprehensive Income [Abstract]
Net loss	$ (107,594)	$ (96,071)	$ (25,032)
Foreign currency translation adjustment	4,604	(93)	(1,896)
Comprehensive loss	$ (102,990)	$ (96,164)	$ (26,928)