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 Income And Comprehensive Income [Abstract]
Net loss	$ (33,821)	$ (19,220)	$ (55,610)	$ (44,605)
Other comprehensive income (loss):
Foreign currency translation adjustment, net of taxes	1,231	2,343	(1,366)	(4,177)
Total comprehensive loss	$ (32,590)	$ (16,877)	$ (56,976)	$ (48,782)