Intangible Assets (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
Dec. 28, 2012	Sep. 28, 2012
Finite-Lived Intangible Assets [Line Items]
Licensed intangibles	$ 14,410	$ 14,410
Accumulated amortization	(1,269)	(918)
Licensed intangibles, net	12,341
Licensed Intangibles
Finite-Lived Intangible Assets [Line Items]
Licensed intangibles	30,074	28,145
Accumulated amortization	(7,050)	(6,286)
Licensed intangibles, net	$ 23,024	$ 21,859
Weighted-average remaining life	65 months	59 months

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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.

Name:	us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant