Note 12 - Financial Instruments and Fair Value Measurements (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
Feb. 28, 2015	Nov. 29, 2014
Note 12 - Financial Instruments and Fair Value Measurements (Details) [Line Items]
Short-term Investments	23,125us-gaap_ShortTermInvestments	$ 23,125us-gaap_ShortTermInvestments
Weighted Average Rate Domestic Deposit, Certificates of Deposit	0.21%
Minimum [Member]
Note 12 - Financial Instruments and Fair Value Measurements (Details) [Line Items]
Maturity of Time Deposits	6 months
Weighted Average Rate Domestic Deposit, Certificates of Deposit	0.16%
Maximum [Member]
Note 12 - Financial Instruments and Fair Value Measurements (Details) [Line Items]
Maturity of Time Deposits	12 months
Weighted Average Rate Domestic Deposit, Certificates of Deposit	0.91%
Weighted Average [Member]
Note 12 - Financial Instruments and Fair Value Measurements (Details) [Line Items]
Maturity of Time Deposits	4 months

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Period of time between issuance and maturity of customer deposits, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 470

-SubTopic 10

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6802200&loc=d3e1835-112601

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- Definition

Investments which are intended to be sold in the short term (usually less than one year or the normal operating cycle, whichever is longer) including trading securities, available-for-sale securities, held-to-maturity securities, and other short-term investments not otherwise listed in the existing taxonomy.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.2)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 1

-Subparagraph g

-Article 7

+ Details

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- Definition

The weighted average interest rate for domestic certificates of deposit liabilities.

+ References

No definition available.

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