Condensed Consolidated Statements of Comprehensive Loss - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Statement Of Income And Comprehensive Income [Abstract]
Net loss	$ (4,426)	$ (11,255)	$ (52,865)	$ (30,829)
Other comprehensive loss:
Cumulative translation loss				(19)
Comprehensive loss	$ (4,426)	$ (11,255)	$ (52,865)	$ (30,848)