Summary of Property, Plant, and Equipment (Detail) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Property Plant And Equipment [Line Items]
Property, plant, and equipment gross, excluding land	$ 10,744	$ 9,883
Accumulated depreciation and amortization	(7,050)	(6,314)
Property, plant, and equipment net, excluding land	3,694	3,569
Land	162	158
Property, plant, and equipment, net	3,856	3,727
Building
Property Plant And Equipment [Line Items]
Property, plant and equipment, gross	208	203
Leasehold Improvements
Property Plant And Equipment [Line Items]
Property, plant and equipment, gross	2,004	2,019
Equipment and Computers
Property Plant And Equipment [Line Items]
Property, plant and equipment, gross	6,603	6,031
Furniture and Fixtures
Property Plant And Equipment [Line Items]
Property, plant and equipment, gross	599	585
Construction in Progress
Property Plant And Equipment [Line Items]
Property, plant and equipment, gross	$ 1,330	$ 1,045