CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Statement of Comprehensive Income [Abstract]
Net loss	$ (276,056)	$ (368,198)	$ (523,837)
Other comprehensive income (loss):
Net unrealized gain (loss) on available-for-sale investments	1,826	(1,114)	(1,568)
Net foreign currency translation adjustment	5,161	(1,636)	(294)
Other comprehensive income (loss)	6,987	(2,750)	(1,862)
Comprehensive loss	$ (269,069)	$ (370,948)	$ (525,699)