Consolidated Statements of Comprehensive Loss - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Statement of Comprehensive Income [Abstract]
Net loss	$ (54,630)	$ (41,742)	$ (35,087)
Other comprehensive (loss) income, net of tax:
Foreign currency translation adjustments	(50)	82	(45)
Unrealized (loss) gain on marketable securities	(104)	(23)	52
Total other comprehensive (loss) income, net of tax	(154)	59	7
Comprehensive loss	$ (54,784)	$ (41,683)	$ (35,080)