Income Taxes - Additional Information (Detail) (USD $)	3 Months Ended	9 Months Ended
Jul. 31, 2012	Jul. 31, 2011	Jul. 31, 2012	Jul. 31, 2011	Oct. 31, 2011
Income Taxes [Line Items]
Provision for income tax as percentage of income before income taxes	33.50%		34.80%	29.90%
Income tax benefit	$ (369,693)	$ 63,072	$ (776,477)	$ (350,337)
Effective tax rate			42.00%
Unrecognized tax benefits	0		0		79,223
Accrued interest and penalties related to uncertain tax positions	$ 0		$ 0		$ 21,106

A ratio calculated by dividing the reported amount of income tax expense attributable to continuing operations for the period by GAAP-basis pretax income from continuing operations.

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The sum of the current income tax expense or benefit and the deferred income tax expense or benefit pertaining to continuing operations.

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- Definition

This element represents the total of accruals as of the date of the statement of financial position for interest recognized for an underpayment of income taxes computed by applying the applicable statutory rate of interest to the difference between a tax position recognized for financial reporting purposes and the amount previously taken or expected to be taken in a tax return of the entity and the amount of statutory penalties for a tax position claimed or expected to be claimed by the entity, in its tax return, that does not meet the minimum statutory threshold to avoid payment of penalties.

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