Note 11 - Impairment of Long-Lived Assets, Discontinued Operations and Property Held for Sale (Details) - Rollforward of Property Held for Sale (USD $) In Thousands, unless otherwise specified	12 Months Ended
Aug. 27, 2014	Aug. 28, 2013	Aug. 29, 2012	Sep. 01, 2010
Rollforward of Property Held for Sale [Abstract]
Balance as of August	$ 449	$ 602		$ 1,046
Disposals	(449)		(444)
Net impairment charges	991	(153)
Balance as of August	$ 991	$ 449	$ 602	$ 1,046

Amount classified as property, plant and equipment attributable to disposal group held for sale or disposed of.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 205

-SubTopic 20

-Section 45

-Paragraph 10

-URI http://asc.fasb.org/extlink&oid=6892542&loc=d3e1107-107759

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 205

-SubTopic 20

-Section 50

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6360339&loc=d3e1436-107760

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 205

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=6360339&loc=d3e1361-107760

Name:	us-gaap_DisposalGroupIncludingDiscontinuedOperationPropertyPlantAndEquipment
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant