CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Statement Of Income And Comprehensive Income [Abstract]
Net loss	$ (28,975)	$ (2,294)
Foreign currency translation adjustments related to continuing operations	(29)	123
Comprehensive loss	$ (29,004)	$ (2,171)