Commitments, Rights of Use and Contingent Liabilities - Schedule of Future Minimum Lease Payments under Non-Cancelable Operating Lease (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Future minimum lease payments:
2019 (remainder of the year)	$ 1,146
2020	4,519
2021	4,193
2022	3,130
2023	1,933
Thereafter	3,651
Total future minimum lease payments	18,572
Less imputed interest	(2,956)
Net present value of future minimum lease payments	15,616
Short-term lease liabilities	4,249
Long-term lease liabilities	11,367	$ 0
Net present value of future minimum lease payments	$ 15,616
Weighted average of remaining operating lease term (in years)	4 years 10 months 6 days
Weighted average of operating lease discount rate (in percentage)	7.51%