Condensed Consolidated Statements of Comprehensive Loss - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Statement of Comprehensive Income [Abstract]
Net loss	$ (102,902)	$ (78,707)	$ (367,832)	$ (165,060)
Other comprehensive income (loss):
Unrealized income (loss) on available-for-sale marketable securities, net of tax	(373)	0	208	5
Comprehensive loss	$ (103,275)	$ (78,707)	$ (367,624)	$ (165,055)