Condensed Consolidated Statements of Comprehensive Loss - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Statement of Comprehensive Income [Abstract]
Net loss	$ (90,393)	$ (122,967)
Other comprehensive income (loss):
Net unrealized gain (loss) on available-for-sale investments	(2,091)	(766)
Net foreign currency translation gain (loss)	(284)	(60)
Other comprehensive income (loss)	(2,375)	(826)
Comprehensive loss	$ (92,768)	$ (123,793)