Financial Expenses, Net - Schedule of Financial Expenses, Net (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Financial expenses:
Interest expense	$ (13,491)	$ (10,261)	$ (5,937)
Amortization of credit facility costs	(2,777)	(1,111)	(667)
Foreign currency transaction losses	(398)		(396)
Others	(242)	(321)	(318)
Financial expenses	(16,908)	(11,693)	(7,318)
Financial income:
Amortization of treasury bills premium	1,986	859	512
Foreign currency transaction gains		549
Interest income	2,652	1,116	659
Financial income	4,638	2,524	1,171
Total financial expenses, net	$ (12,270)	$ (9,169)	$ (6,147)