Business Combination - Estimated Fair Value of Intangible Assets Acquired under the Transaction (Detail) (USD $) In Thousands, unless otherwise specified	Apr. 01, 2012
Acquired Finite-Lived Intangible Assets [Line Items]
Total	$ 1,890
Existing technology [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Total	1,612
Customer relationships [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Total	$ 278

Amount of acquisition cost of a business combination allocated to assets, excluding financial assets and goodwill, lacking physical substance.

No definition available.

Name:	us-gaap_BusinessAcquisitionPurchasePriceAllocationIntangibleAssetsOtherThanGoodwill
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant