Stockholders' Equity (Details 4) (Employee and directors' stock options, USD $) In Thousands, unless otherwise specified	3 Months Ended
Feb. 28, 2015	Feb. 28, 2014
Other Disclosures
Number of option holders	18
2009 Stock Option Plan
Griffin Stock Option Plan
Expiration term	10 years
Compensation expense for stock options
Compensation expense	$ 93	$ 23
Related tax benefit	18	24
Continuing operations \| 2009 Stock Option Plan
Compensation expense for stock options
Compensation expense	93	153
Related tax benefit	18	24
Discontinued operations. \| 2009 Stock Option Plan
Compensation expense for stock options
Compensation expense		$ (130)

The period of time, from the grant date until the time at which the share-based award expires.

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- Definition

The number of option holders as at the end of the reporting period.

+ References

No definition available.

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- Definition

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.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

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-SubTopic 10

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-Name Staff Accounting Bulletin (SAB)

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- Definition

The total recognized tax benefit related to compensation cost for equity-based payment arrangements recognized in income during the period.

+ References

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

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-Name Accounting Standards Codification

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