Note 8 - Post-Employment Benefit Obligations (Details) - Recognized expense under the deferred compensation plan (USD $) In Thousands, unless otherwise specified	3 Months Ended	9 Months Ended
Aug. 31, 2013	Aug. 25, 2012	Aug. 31, 2013	Aug. 25, 2012
Recognized expense under the deferred compensation plan [Abstract]
Deferred compensation plan expense	$ 72	$ 78	$ 216	$ 234

The compensation expense recognized during the period pertaining to the deferred compensation arrangement.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 1

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 710

-SubTopic 10

-Section 30

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6409875&loc=d3e20015-108363

Name:	us-gaap_DeferredCompensationArrangementWithIndividualCompensationExpense
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration