Supplemental Information - Schedule of Long-Lived Assets by Location (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	$ 16,564	$ 15,366
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	8,170	8,289
Switzerland
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	3,695	2,513
Israel
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	2,393	2,236
Germany
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	778	1,054
Others
Revenues from External Customers and Long-Lived Assets [Line Items]
Long-lived assets	$ 1,528	$ 1,274