Condensed Consolidated Statements of Comprehensive Loss (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Statement Of Income And Comprehensive Income [Abstract]
NET LOSS	$ (805)	$ (14,975)	$ (18,772)	$ (40,243)
OTHER COMPREHENSIVE INCOME (LOSS):
Foreign currency translation adjustments	(19)	13	(28)	26
Other comprehensive income (loss)	(19)	13	(28)	26
COMPREHENSIVE LOSS	$ (824)	$ (14,962)	$ (18,800)	$ (40,217)