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 Income And Comprehensive Income [Abstract]
Net loss	$ (28,678)	$ (24,205)	$ (84,288)	$ (68,810)
Other comprehensive income (loss):
Foreign currency translation adjustment, net of taxes	(3,095)	3,455	(4,461)	(722)
Total comprehensive loss	$ (31,773)	$ (20,750)	$ (88,749)	$ (69,532)