CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Statement Of Income And Comprehensive Income [Abstract]
Net loss	$ (78,994)	$ (57,002)
Foreign currency translation adjustments related to continuing operations	116	24
Comprehensive loss	$ (78,878)	$ (56,978)