Consolidated Statements of Comprehensive Loss - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Statement of Comprehensive Income [Abstract]
Net loss	$ (256,256)	$ (284,126)	$ (227,006)
Other comprehensive loss:
Unrealized (loss) gain on investment securities	(3,826)	(845)	353
Comprehensive loss	$ (260,082)	$ (284,971)	$ (226,653)