Condensed Consolidated Statements of Comprehensive Loss - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Condensed Consolidated Statements of Comprehensive Loss
Net loss	$ (7,528)	$ (11,094)	$ (24,812)	$ (51,514)
Net changes related to available-for-sale investment debt securities:
Unrealized losses on investment debt securities	(506)	(23)	(1,526)	(367)
Reclassification adjustment for realized losses on investment debt securities included in other income, net	0	0		2
Net unrealized losses on investment debt securities	(506)	(23)	(1,526)	(365)
Foreign currency translation gains (losses)	1,445	(304)	1,851	(23)
Other comprehensive income (loss)	939	(327)	325	(388)
Comprehensive loss	$ (6,589)	$ (11,421)	$ (24,487)	$ (51,902)