CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Statement of Comprehensive Income [Abstract]
Net loss	$ (10,573)	$ (7,463)
Other comprehensive (loss) income, net of tax
Foreign currency translation adjustment, net of income tax expense of $0 and $3 for the three months ended March 31, 2020 and 2019, respectively	(51)	9
Unrealized gain on available-for-sale securities, net of income tax benefit (expense) of $0 and $(15) for the three months ended March 31, 2020 and 2019, respectively	42	43
Other comprehensive (loss) income, net of tax	(9)	52
Comprehensive loss	$ (10,582)	$ (7,411)