Other expenses, net (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Other Income and Expenses [Abstract]
Foreign exchange (loss) gain	$ (165)	$ (178)	$ 3,058	$ (317)
Other	(13)	(65)		(70)
Other			27
Total other income and expense	$ (178)	$ (243)	$ 3,085	$ (387)