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Segment Disclosure - Additional information (Detail) | 3 Months Ended | 9 Months Ended
--- | --- | ---
Jul. 31, 2014 Segment Customer | Jul. 31, 2013 Customer Segment | Jul. 31, 2014 Customer Segment | Jul. 31, 2013 Customer Segment
Segment Reporting Information [Line Items] |  |  |  |
Number of reportable operating segment | 1 | 1 | 1 | 1
Number of major customers | 1 | 1 | 1 | 1
Customer concentration risk | Revenue |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Percentage of revenues contributed by major customers | 10.50% | 11.50% | 10.70% | 11.40%

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- Definition For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 21 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=28364263&loc=d3e13537-108611 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6404-108592 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=28364263&loc=d3e13531-108611 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 18 -URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6351-108592 + Details
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