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	$ (15,781)	$ (1,217)	$ (41,543)	$ (13,486)
Other comprehensive (loss) income, net of tax:
Foreign currency translation adjustment	(1,450)	1,198	2,160	2,389
Net change in unrealized gains (losses) on investments	0	167	(223)	352
Other comprehensive (loss) income, net of tax	(1,450)	1,365	1,937	2,741
Total comprehensive (loss) income	$ (17,231)	$ 148	$ (39,606)	$ (10,745)