Amount of deferred revenue as of balance sheet date. Deferred revenue represents collections of cash or other assets related to a revenue producing activity for which revenue has not yet been recognized. Generally, an entity records deferred revenue when it receives consideration from a customer before achieving certain criteria that must be met for revenue to be recognized in conformity with GAAP.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 605

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SAB TOPIC 13.A.4(a).Q1 Response)

-URI http://asc.fasb.org/extlink&oid=6600647&loc=d3e214044-122780

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

-Publisher SEC

-Name Staff Accounting Bulletin (SAB)

-Number Topic 13

-Section A

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

Revenue Recognition - Additional Information (Detail) (USD $)	3 Months Ended					3 Months Ended
	Jul. 28, 2012 Year	Jul. 28, 2012 Annual Fee	Jul. 28, 2012 Nook	Apr. 28, 2012 Nook	Jul. 30, 2011 Nook	Jul. 28, 2012 Nook Minimum	Jul. 28, 2012 Nook Maximum
Deferred Revenue Arrangement [Line Items]
Estimated life of NOOK, years	2
Average Percent, NOOK's Sales price						2.00%	5.00%
Deferred Revenue			$ 18,171,000	$ 19,785,000	$ 18,338,000
Non-refundable, after first 30 days, annual fee		$ 25.00