CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Statement of Comprehensive Income [Abstract]
Net loss	$ (21,119)	$ (18,627)	$ (42,314)	$ (55,628)
Foreign currency translation adjustment	565	(1,931)	(1,181)	538
Comprehensive loss	$ (20,554)	$ (20,558)	$ (43,495)	$ (55,090)