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	$ (139,674)	$ (256,256)	$ (284,126)
Other comprehensive income (loss):
Unrealized gain (loss) on investment securities	4,294	(3,826)	(845)
Comprehensive loss	$ (135,380)	$ (260,082)	$ (284,971)