Note 11 - Income Taxes (Details) - Activity Related to Gross Unrecognized Tax Benefits (USD $) In Thousands, unless otherwise specified	3 Months Ended	12 Months Ended
Aug. 31, 2013	Nov. 29, 2014	Nov. 30, 2013	Nov. 24, 2012
Activity Related to Gross Unrecognized Tax Benefits [Abstract]
Balance, beginning of the year		$ 1,497us-gaap_UnrecognizedTaxBenefits	$ 1,228us-gaap_UnrecognizedTaxBenefits	$ 1,502us-gaap_UnrecognizedTaxBenefits
Balance, end of the year		1,236us-gaap_UnrecognizedTaxBenefits	1,497us-gaap_UnrecognizedTaxBenefits	1,228us-gaap_UnrecognizedTaxBenefits
Gross increases			401	10
Gross decreases due to settlements		(221)
Gross decreases primarily due to the expiration of statutes	$ (221)	$ (40)	$ (132)	$ (284)

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Unrecognized Tax Benefits Gross Increases

+ References

No definition available.

+ Details

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- Definition

Amount of unrecognized tax benefits pertaining to uncertain tax positions taken in tax returns.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Unrecognized Tax Benefit

-URI http://asc.fasb.org/extlink&oid=6527854

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

-Section 50

-Paragraph 15A

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=6907707&loc=SL6600010-109319

+ Details

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- Definition

Amount of decrease in unrecognized tax benefits resulting from settlements with taxing authorities.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

-Section 50

-Paragraph 15A

-Subparagraph (a)(3)

-URI http://asc.fasb.org/extlink&oid=6907707&loc=SL6600010-109319

+ Details

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- Definition

Amount of decrease in unrecognized tax benefits resulting from lapses of applicable statutes of limitations.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

-Section 50

-Paragraph 15A

-Subparagraph (a)(4)

-URI http://asc.fasb.org/extlink&oid=6907707&loc=SL6600010-109319

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