Subsequent Event (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
Dec. 29, 2012
Subsequent Event [Abstract]
Retroactive reinstatement of R&D tax credit, benefit amount	$ 1.3

Monetary effect of a change in the tax status effective after year-end but before the financial statements for the reporting period are issued or available to be issue by the entity.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

-Section 50

-Paragraph 4

-URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32590-109319

Name:	us-gaap_SubsequentEventEffectOfChangeInTaxStatus
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration