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 $)	6 Months Ended					6 Months Ended
	Oct. 27, 2012 Y	Oct. 27, 2012 Annual Fee	Oct. 27, 2012 Nook	Apr. 28, 2012 Nook	Oct. 29, 2011 Nook	Oct. 27, 2012 Nook Minimum	Oct. 27, 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			$ 15,946,000	$ 19,785,000	$ 16,027,000
Non-refundable, after first 30 days, annual fee		$ 25.00