Strategic Arrangement - Additional Information (Detail) (Siemens AG, Strategic Global Partnership, USD $) In Millions, unless otherwise specified	6 Months Ended
Mar. 28, 2014
Siemens AG \| Strategic Global Partnership
Strategic Alliance And Collaboration [Line Items]
Fixed fee committed	$ 10
License fee committed	20
Fixed fees payments made during period	2.0
Accrual of fixed fees during the period	1
Amount payable related to product development milestones	$ 0

The amount of cash paid during the current period for fees which are not defined elsewhere in the taxonomy.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 25

-Subparagraph (g)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3536-108585

Name:	us-gaap_PaymentsForFees
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration