Commitments, Rights of Use and Contingent Liabilities - Schedule of Future Minimum Lease Payments under Non-Cancelable Operating Lease (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Future minimum lease payments:
2019 (excluding the six months ended June 30, 2019)	$ 2,265
2020	4,116
2021	3,826
2022	2,927
2023	1,899
Thereafter	3,695
Total future minimum lease payments	18,728
Less imputed interest	(3,198)
Net present value of future minimum lease payments	15,530
Short-term lease liabilities	3,948
Long-term lease liabilities	11,582	$ 0
Net present value of future minimum lease payments	$ 15,530
Weighted average of remaining operating lease term	5 years 2 months 26 days
Weighted average of operating lease discount rate	7.44%