CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Statement of Comprehensive Income [Abstract]
Net loss	$ (11,987)	$ (8,805)	$ (25,762)	$ (12,269)
Other comprehensive income, net of tax:
Foreign currency translation adjustment	277	1,022	3,610	1,191
Net change in unrealized gains (losses) on investments	0	13	(223)	185
Other comprehensive income, net of tax	277	1,035	3,387	1,376
Total comprehensive loss	$ (11,710)	$ (7,770)	$ (22,375)	$ (10,893)