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Share-Based Payments - Additional Information (Detail) (USD $)	3 Months Ended
	Jan. 31, 2013
Compensation Related Costs Disclosure [Line Items]
Nonvested shares, awarded to members of company's board of directors	171,248
Fair value of nonvested shares, awarded to members of company's board of directors	$ 3.27

The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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