CONSOLIDATED STATEMENTS OF COMPREHENSIVE (LOSS) INCOME - 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	$ (36,136)	$ (14,229)	$ (445,503)	$ (10,185)
Other comprehensive (loss) income, net of applicable taxes:
Foreign currency translation adjustment	(1,457)	2,612	(2,896)	2,898
Unrealized gain (loss) on short-term investments	0	(325)	0	(147)
Total other comprehensive (loss) income	(1,457)	2,287	(2,896)	2,751
Comprehensive loss	$ (37,593)	$ (11,942)	$ (448,399)	$ (7,434)