Note 14 - Capital Stock and Stock Compensation (Details) - Additional Information Regarding Outstanding Stock Options (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
Nov. 29, 2014
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Shares, Options outstanding (in Shares)	437,250
Shares, Options exercisable (in Shares)	414,500
(in Dollars)	$ 3,349
(in Dollars)	3,349
(in Dollars)	$ 3,084
Range of $3.23 - $6.45 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise price range, lower range limit	$ 3.23
Exercise price range, upper range limit	$ 6.45
Shares, Options outstanding (in Shares)	68,000
Weighted average remaining contractual life , Options outstanding	5 years 219 days
Weighted average exercise price, Options outstanding	$ 4.38
Shares, Options exercisable (in Shares)	68,000
Weighted average exercise price, Options exercisable	$ 4.38
Range of $6.45 - $9.67 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise price range, lower range limit	$ 6.45
Exercise price range, upper range limit	$ 9.67
Shares, Options outstanding (in Shares)	62,750
Weighted average remaining contractual life , Options outstanding	6 years 6 months
Weighted average exercise price, Options outstanding	$ 8.03
Shares, Options exercisable (in Shares)	40,000
Weighted average exercise price, Options exercisable	$ 8.03
Range of $9.68 - $12.90 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise price range, lower range limit	$ 9.68
Exercise price range, upper range limit	$ 12.90
Shares, Options outstanding (in Shares)	104,000
Weighted average remaining contractual life , Options outstanding	2 years 328 days
Weighted average exercise price, Options outstanding	$ 10.60
Shares, Options exercisable (in Shares)	104,000
Weighted average exercise price, Options exercisable	$ 10.60
Range of $12.91 - $16.13 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise price range, lower range limit	$ 12.91
Exercise price range, upper range limit	$ 16.13
Shares, Options outstanding (in Shares)	52,500
Weighted average remaining contractual life , Options outstanding	2 years 146 days
Weighted average exercise price, Options outstanding	$ 14.73
Shares, Options exercisable (in Shares)	52,500
Weighted average exercise price, Options exercisable	$ 14.89
Range of $16.14 - $19.35 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise price range, lower range limit	$ 16.14
Exercise price range, upper range limit	$ 19.35
Shares, Options outstanding (in Shares)	150,000
Weighted average remaining contractual life , Options outstanding	1 year 219 days
Weighted average exercise price, Options outstanding	$ 16.96
Shares, Options exercisable (in Shares)	150,000
Weighted average exercise price, Options exercisable	$ 16.96

Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of vested portions of options outstanding and currently exercisable.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding.

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Weighted average exercise price as of the balance sheet date for those equity-based payment arrangements exercisable and outstanding.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

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The floor of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range.

+ References

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-Publisher FASB

-Name Accounting Standards Codification

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The number of shares reserved for issuance pertaining to the outstanding exercisable stock options as of the balance sheet date in the customized range of exercise prices for which the market and performance vesting condition has been satisfied.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

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-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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The number of shares reserved for issuance pertaining to the outstanding stock options as of the balance sheet date for all option plans in the customized range of exercise prices.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

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The weighted average price as of the balance sheet date at which grantees could acquire the underlying shares with respect to all outstanding stock options which are in the customized range of exercise prices.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

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- Definition

Weighted average remaining contractual term of outstanding stock options, 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

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The ceiling of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range.

+ References

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-Publisher FASB

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