CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS - 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	$ (14,332)	$ (3,989)	$ (41,168)	$ (12,713)
Other comprehensive income / (loss), net of tax:
Foreign currency translation adjustment	(233)	148	(432)	295
Other comprehensive income/ (loss), net of tax	(233)	148	(432)	295
Comprehensive loss	$ (14,565)	$ (3,841)	$ (41,600)	$ (12,418)