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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.

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Weighted average remaining contractual term for vested portions of options outstanding and currently exercisable or convertible, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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The total accumulated difference between fair values of underlying shares on dates of exercise and exercise price on options which were exercised (or share units converted) into shares during the reporting period under the plan.

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For presentations that combine terminations, the number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan or that expired.

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Weighted average price of options that were either forfeited or expired.

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Net number of share options (or share units) granted during the period.

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The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

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- Definition

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

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- Definition

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.

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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Weighted average price at which option holders acquired shares when converting their stock options into shares.

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No definition available.

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

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Number of share options (or share units) exercised during the current period.

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

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-Name Accounting Standards Codification

-Topic 210

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Stock Options and Incentive Compensation Stock Option Activity (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended	12 Months Ended
	Jan. 31, 2012	Oct. 31, 2012	Oct. 31, 2011	Oct. 31, 2010
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number		362,085	520,185	683,692
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price		$ 9.99	$ 8.54	$ 6.13
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Net of Forfeitures	56,500	56,500	154,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value		$ 8.10	$ 12.10
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period		(158,513)	(208,107)
Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price		$ 4.01	$ 3.62
Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures and Expirations in Period		(56,087)	(109,400)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures and Expirations in Period, Weighted Average Exercise Price		$ 10.96	$ 8.15
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number		225,585
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Exercisable Options, Weighted Average Exercise Price		$ 9.71
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value		$ 838
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value		653
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Total Intrinsic Value		$ 1,167	$ 901
Options Granted October 26, 1994 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term		1 year 11 months 20 days
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number		2,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number		2,000
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Exercisable Options, Weighted Average Exercise Price		$ 8,960.00
Options Granted October 28, 2005 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term		2 years 11 months 25 days
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number		15,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number		15,000
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Exercisable Options, Weighted Average Exercise Price		$ 13,060.00
Options Granted February 14, 2007 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term		4 years 3 months 15 days
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number		65,649
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number		65,649
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Exercisable Options, Weighted Average Exercise Price		$ 14,740.00
Options Granted February 21, 2008 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term		5 years 3 months 25 days
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number		2,670
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number		2,670
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Exercisable Options, Weighted Average Exercise Price		$ 8,830.00
Options Granted December 12, 2008 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term		6 years 1 month 14 days
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number		10,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number		10,000
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Exercisable Options, Weighted Average Exercise Price		$ 2,110.00
Options Granted August 13, 2009 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term		6 years 9 months 10 days
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number		90,266
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number		90,266
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Exercisable Options, Weighted Average Exercise Price		$ 5,300.00
Options Granted December 10, 2010 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term		8 years 1 month 11 days
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number		111,695
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number		37,232
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Exercisable Options, Weighted Average Exercise Price		$ 12,040.00
Options Granted Non-Qualified December 10, 2010 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term		3 years 1 month 10 days
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number		8,305
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number		2,768
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Exercisable Options, Weighted Average Exercise Price		$ 13,240.00
Options Granted December 8, 2012 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term		9 years 1 month 24 days
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number		56,500
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number		0
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Exercisable Options, Weighted Average Exercise Price		$ 8.10