CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS [Abstract]
Net loss	$ (46,992)	$ (82,466)	$ (217,292)	$ (253,210)
Unrealized losses on debt securities, net of tax	(8,734)	(1,618)	(29,508)	(6,321)
Currency translation adjustment	(399)	(23)	(964)	(45)
Comprehensive loss	$ (56,125)	$ (84,107)	$ (247,764)	$ (259,576)