Property and Equipment - Summary of Property and Equipment (Detail) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Property, Plant and Equipment [Line Items]
Property and equipment, Gross	$ 9,795	$ 7,270
Accumulated depreciation and amortization	(5,387)	(4,150)
Property and equipment, net	4,408	3,120
Machinery and Manufacturing Equipment [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, Gross	5,846	3,797
Computer Equipment [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, Gross	1,875	1,710
Furniture [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, Gross	374	358
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, Gross	$ 1,700	$ 1,405