Financial Income and Expenses - Financial income (expense) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Other Income and Expenses [Abstract]
Financial income from cash equivalents	$ 1,352	$ 2,105	$ 1,910
Interest and fees	(2,367)	(653)	(583)
Interest on debt	(1,134)	(553)	(583)
Fees	(1,233)	(100)	0
Foreign exchange (loss) gain	506	(5,971)	10,096
Other financial expense	(37)	(22)	(33)
Total financial income (expense)	$ (546)	$ (4,541)	$ 11,390