Common Stock Repurchase Program (Detail) (Common Stock, USD $) In Millions, except Share data, unless otherwise specified	12 Months Ended	0 Months Ended	6 Months Ended
Apr. 28, 2013	Aug. 29, 2012 Common Stock Repurchase Program August 2012 [Member]	Oct. 27, 2013 Common Stock Repurchase Program August 2012 [Member]
Stockholders Equity Note [Line Items]
Authorization amount for repurchase of common stock		$ 2.0
Common stock repurchased	502,595		0

Number of shares that have been repurchased and retired during the period.

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 04

-Article 3

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 505

-SubTopic 10

-Section 50

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 29, 30

-Article 5

Name:	us-gaap_StockRepurchasedAndRetiredDuringPeriodShares
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration