Summary of Intangible Assets (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Schedule of Intangible Asset by Major Class [Line Items]
Intangible Assets, Gross (Excluding Goodwill), Total	$ 10,374	$ 10,675
Finite Lived Intangible Assets, Accumulated Amortization	$ 6,620	5,385
Trademark
Schedule of Intangible Asset by Major Class [Line Items]
Weighted average life	Indefinite
Indefinite-lived intangible assets		833
Patents and licenses, software and hardware designs
Schedule of Intangible Asset by Major Class [Line Items]
Weighted average life	6 years
Finite-lived intangible assets, gross	$ 4,754	4,222
Finite Lived Intangible Assets, Accumulated Amortization	$ 2,839	2,171
Developed technology
Schedule of Intangible Asset by Major Class [Line Items]
Weighted average life	10 years
Finite-lived intangible assets, gross	$ 2,782	2,782
Finite Lived Intangible Assets, Accumulated Amortization	$ 1,739	1,461
Customer relationships and non-compete
Schedule of Intangible Asset by Major Class [Line Items]
Weighted average life	9 years
Finite-lived intangible assets, gross	$ 2,838	2,838
Finite Lived Intangible Assets, Accumulated Amortization	$ 2,042	$ 1,753