Consolidated Statements of Comprehensive Loss - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Statement Of Income And Comprehensive Income [Abstract]
Net loss	$ (23,159)	$ (17,716)
Other comprehensive loss:
Foreign currency translation adjustment	(2,489)	(1,077)
Changes in unrealized (loss) gain on investments, net of income taxes of ($36) for the three months ended March 31, 2021 and $0 for the three months ended March 31, 2020	(240)	583
Comprehensive loss	$ (25,888)	$ (18,210)