CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS (UNAUDITED) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Statement of Comprehensive Income [Abstract]
Net loss	$ (47,306)	$ (19,758)	$ (72,201)	$ (33,289)
Other comprehensive income (loss):
Foreign currency translation adjustments	(164)	105	(460)	1,402
Total comprehensive loss	$ (47,470)	$ (19,653)	$ (72,661)	$ (31,887)