CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Statement Of Income And Comprehensive Income [Abstract]
Net loss	$ (9,416)	$ (4,326)
Other comprehensive income, net of tax:
Unrealized gain on investments		71
Total other comprehensive income		71
Comprehensive loss	$ (9,416)	$ (4,255)