CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Statement of Comprehensive Income [Abstract]
Net loss	$ (59,049)	$ (129,706)	$ (308,510)	$ (378,192)
Other comprehensive income (loss):
Net unrealized gain (loss) on available-for-sale investments	490	(176)	(2,589)	(1,006)
Net foreign currency translation gain (loss)	(468)	13	(1,423)	(262)
Other comprehensive income (loss)	22	(163)	(4,012)	(1,268)
Comprehensive loss	$ (59,027)	$ (129,869)	$ (312,522)	$ (379,460)