Condensed Consolidated Statements of Comprehensive Loss - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Statement of Comprehensive Income [Abstract]
Net loss	$ (42,784)	$ (86,603)	$ (86,837)	$ (158,722)
Other comprehensive gain (loss):
Unrealized gain (loss) on investment securities	430	(1,474)	1,922	(4,438)
Comprehensive loss	$ (42,354)	$ (88,077)	$ (84,915)	$ (163,160)