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Concentration of Credit Risk - Additional Information (Detail)	3 Months Ended		9 Months Ended
	Jul. 31, 2012	Jul. 31, 2011	Jul. 31, 2012	Jul. 31, 2011
Concentration Risk [Line Items]
Net sales from one major customer	36.00%	16.00%	25.00%	18.00%

X

- Details

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X

- Definition

Percentage of revenue generated from a single external customer that accounts for 10 percent or more of an entity's revenues.

+ References

No definition available.

+ Details

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