CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS (Unaudited) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Statement Of Income And Comprehensive Income [Abstract]
Net loss	$ (7,076)	$ (2,697)	$ (8,992)	$ (8,212)
Foreign currency translation adjustments related to continuing operations	10	(242)	(12)	(52)
Comprehensive loss	$ (7,066)	$ (2,939)	$ (9,004)	$ (8,264)

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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