Other Intangible Assets (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Amortized intangible assets
License agreements	$ 860	$ 851
Patents	6,522	6,482
Other	272	269
Finite-Lived Intangible Assets, Gross	7,654	7,602
Finite-Lived Intangible Assets, Accumulated Amortization	(3,829)	(3,065)
Licensing Agreements [Member]
Amortized intangible assets
Finite-Lived Intangible Assets, Accumulated Amortization	(854)	(721)
Patents [Member]
Amortized intangible assets
Finite-Lived Intangible Assets, Accumulated Amortization	(2,781)	(2,182)
Other Intangible Assets [Member]
Amortized intangible assets
Finite-Lived Intangible Assets, Accumulated Amortization	$ (194)	$ (162)

Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 30

-Section 50

-Paragraph 2

-Subparagraph (a)(1)

-URI http://asc.fasb.org/extlink&oid=7658586&loc=d3e16323-109275

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 142

-Paragraph 45

-Subparagraph a(1)

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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- Definition

Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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- Definition

Gross carrying amount as of the balance sheet date of certain rights acquired to exercise a certain privilege or pursue a particular business or occupation and which is deemed to have a finite economic life.

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- Definition

Gross carrying amount before accumulated amortization as of the balance sheet date of the costs pertaining to the exclusive legal rights granted to the owner of the patent to exploit an invention or a process for a period of time specified by law. Such costs may have been expended to directly apply and receive patent rights, or to acquire such rights.

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Gross carrying amount before accumulated amortization as of the balance sheet date of intangible assets not otherwise specified in the taxonomy having a reasonably expected period of economic benefit.

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