Compensation Plans (Details 3) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
Feb. 29, 2012 Y	Nov. 30, 2011
Additional information related to stock options outstanding
Number of options, Outstanding Net of Expected Forfeitures	14	14
Number of options, Options Exercisable	14
Weighted-average exercise price, Outstanding Net of Expected Forfeitures	$ 11.44	$ 11.44
Weighted-average exercise price, Options Exercisable	$ 11.44
Aggregate intrinsic value, Outstanding Net of Expected Forfeitures	$ 74
Aggregate intrinsic value, Options Exercisable	$ 74
Weighted-average remaining contractual term, in years, Outstanding Net of Expected Forfeitures	0.61
Weighted-average remaining contractual term, in years, Options Exercisable	0.61

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The total dollar difference between fair values of the underlying shares reserved for issuance and exercise prices of vested portions of options outstanding and currently exercisable under the option plan as of the balance sheet date.

+ References

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

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The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

+ References

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-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

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The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.

+ References

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The weighted average period between the balance sheet date and expiration for all vested portions of options outstanding and currently exercisable (or convertible) under the plan, which may be expressed in a decimal value for number of years.

+ References

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The total dollar difference between fair values of the underlying shares reserved for issuance and exercise prices pertaining to options outstanding under the plan as of the balance sheet date.

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The number of shares reserved for issuance under stock option agreements awarded under the plan that validly exist and are outstanding as of the balance sheet date, including vested options.

+ References

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

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The weighted average price as of the beginning of the year at which grantees can acquire the shares reserved for issuance under the stock option plan.

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-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

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The weighted average period between the balance sheet date and expiration for all awards outstanding under the plan, which may be expressed in a decimal value for number of years.

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