Property and Equipment, Net - Schedule of Property and Equipment, Net (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Property Plant And Equipment [Line Items]
Property and equipment, gross	$ 17,972	$ 16,116
Accumulated depreciation and amortization	(8,941)	(6,304)
Depreciated cost	9,031	9,812
Computers and laboratory equipment
Property Plant And Equipment [Line Items]
Property and equipment, gross	10,833	10,121
Office furniture
Property Plant And Equipment [Line Items]
Property and equipment, gross	2,303	1,931
Production equipment
Property Plant And Equipment [Line Items]
Property and equipment, gross	1,222	1,179
Leasehold improvements
Property Plant And Equipment [Line Items]
Property and equipment, gross	$ 3,614	$ 2,885