Revenue by Geographic Area Based upon Country of Destination (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
Dec. 28, 2012	Dec. 30, 2011
Revenue from External Customer [Line Items]
Total net revenue	$ 44,394	$ 33,932
Americas
Revenue from External Customer [Line Items]
Total net revenue	11,510	5,516
Asia Pacific
Revenue from External Customer [Line Items]
Total net revenue	29,430	26,558
Europe Middle East Africa
Revenue from External Customer [Line Items]
Total net revenue	$ 3,454	$ 1,858

Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.1)

-URI http://asc.fasb.org/extlink&oid=6880815&loc=d3e20235-122688

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 1

-Article 5

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