CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Statement of Comprehensive Income [Abstract]
Net loss	$ (159,068)	$ (125,519)	$ (249,461)	$ (248,486)
Other comprehensive income (loss):
Net unrealized gain (loss) on available-for-sale investments	(988)	(64)	(3,079)	(830)
Net foreign currency translation gain (loss)	(671)	(215)	(955)	(275)
Other comprehensive income (loss)	(1,659)	(279)	(4,034)	(1,105)
Comprehensive loss	$ (160,727)	$ (125,798)	$ (253,495)	$ (249,591)