Financial Income and Expenses - Financial income (expense) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Other Income and Expenses [Abstract]
Financial income from cash equivalents	$ 382	$ 177
Interest and fees	(432)	(523)
Interest on debt	(380)	(430)
Fees	(52)	(93)
Foreign exchange gain (loss)	(1,628)	(1,598)
Other financial expense	1,344	(30)
Total financial income (expense)	$ (334)	$ (1,974)