Stockholders' Equity (Details 5) (Employee and directors' stock options, USD $) In Thousands, unless otherwise specified	3 Months Ended	6 Months Ended
May 31, 2014	Jun. 01, 2013	May 31, 2014	Jun. 01, 2013
Griffin Stock Option Plan
Number of option holders	14		14
2009 Stock Option Plan
Compensation expense for stock options
Compensation expense	$ 60	$ 152	$ 83	$ 267
Related tax benefit - continuing operations	16	28	40	57
2009 Stock Option Plan \| Continuing operations
Compensation expense for stock options
Compensation expense	60	130	213	236
2009 Stock Option Plan \| Discontinued operations
Compensation expense for stock options
Compensation expense		$ 22	$ (130)	$ 31

Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

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 718

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SAB TOPIC 14.F)

-URI http://asc.fasb.org/extlink&oid=27013229&loc=d3e301413-122809

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

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

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Staff Accounting Bulletin (SAB)

-Number Topic 14

-Section F

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