Condensed Consolidated Statements of Comprehensive (Loss) Income - 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	$ (32,085)	$ (28,395)	$ (72,657)	$ (47,654)
Other comprehensive income (loss):
Unrealized gain (loss) on available-for-sale securities, net of income tax expense of $0, $33, $0, and $33 for the three and six months ended June 30, 2020 and 2019, respectively.	780	100	(134)	100
Foreign currency translation adjustments	793	228	378	(162)
Other comprehensive income (loss)	1,573	328	244	(62)
Total comprehensive loss	$ (30,512)	$ (28,067)	$ (72,413)	$ (47,716)