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 Comprehensive Income [Abstract]
Net loss	$ (18,627)	$ (23,987)	$ (55,628)	$ (42,877)
Foreign currency translation adjustment	(1,931)	(7)	538	200
Comprehensive loss	$ (20,558)	$ (23,994)	$ (55,090)	$ (42,677)