Balance Sheet Details - Schedule of Property, Plant and Equipment, Net (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Property Plant And Equipment [Abstract]
Land and building	$ 2,584	$ 2,584
Machinery and equipment	27,938	23,493
Furniture and fixtures	3,121	2,699
Computer equipment and software	5,778	5,204
Leasehold improvements	9,252	8,116
Property, plant and equipment, gross	48,673	42,096
Accumulated depreciation	(32,824)	(30,238)
Total property, plant and equipment, net	$ 15,849	$ 11,858