Intangible and Other Assets, Net (Detail) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Finite-Lived Intangible Assets [Line Items]
Less accumulated amortization	$ (5,107)	$ (5,076)
Intangible assets, net	868	899
Inventory, non-current	1,019	813
Other assets	4,353	4,393
Intangible and Other Assets, Net	6,240	6,105
Capitalized patent and license costs
Finite-Lived Intangible Assets [Line Items]
Intangible assets, gross	$ 5,975	$ 5,975