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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	$ (204,149)	$ (623,506)	$ (595,625)
Other comprehensive loss, before tax:
Unrealized gain (loss) on available-for-sale investments	5,343	(3,823)	(2,162)
Foreign currency adjustment	1,321	30	23
Comprehensive loss, before tax	(197,485)	(627,299)	(597,764)
Income tax benefit related to items of other comprehensive loss	0	0	170
Comprehensive loss, net of tax	$ (197,485)	$ (627,299)	$ (597,594)

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