Condensed Consolidated Statements of Comprehensive Loss (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Statement Of Income And Comprehensive Income [Abstract]
NET LOSS	$ (2,937)	$ (16,879)	$ (17,967)	$ (25,268)
OTHER COMPREHENSIVE INCOME (LOSS):
Foreign currency translation adjustments	(7)	(12)	(9)	13
Other comprehensive income (loss)	(7)	(12)	(9)	13
COMPREHENSIVE LOSS	$ (2,944)	$ (16,891)	$ (17,976)	$ (25,255)