Condensed Consolidated Statements Of Comprehensive Loss - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Statement of Comprehensive Income [Abstract]
Net loss	$ (9,636)	$ (9,235)	$ (23,015)	$ (23,099)
Foreign currency translation adjustments	2,569	(308)	3,391	6,436
Comprehensive loss	$ (7,067)	$ (9,543)	$ (19,624)	$ (16,663)