Summary of Intangible Assets (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Intangible Assets by Major Class [Line Items]
Intangible Assets, Gross (Excluding Goodwill)	$ 10,073	$ 10,408
Finite Lived Intangible Assets, Accumulated Amortization	4,071	3,680
Patents and licenses, software and hardware designs
Intangible Assets by Major Class [Line Items]
Weighted average life	6 years
Finite-lived intangible assets, gross	3,620	3,955
Finite Lived Intangible Assets, Accumulated Amortization	1,461	1,684
Developed technology
Intangible Assets 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	1,182	904
Customer relationships and non-compete
Intangible Assets 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	1,428	1,092
Trademark
Intangible Assets by Major Class [Line Items]
Weighted average life	Indefinite
Indefinite-lived intangible assets	$ 833	$ 833