CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Statement of Comprehensive Income [Abstract]
Net loss	$ (32,807)	$ (38,710)	$ (75,121)	$ (94,338)
Foreign currency translation adjustment	(3,056)	2,292	(4,237)	1,754
Comprehensive loss	$ (35,863)	$ (36,418)	$ (79,358)	$ (92,584)