Segment Disclosure - Additional information (Detail)	3 Months Ended		9 Months Ended
	Jul. 31, 2015 Segment Customer	Jul. 31, 2014 Segment Customer	Jul. 31, 2015 Segment Customer	Jul. 31, 2014 Segment Customer
Segment Reporting Information [Line Items]
Number of reportable operating segment | Segment	1	1	1	1
Number of major customers	1	1	1	1
Customer concentration risk | Revenues
Segment Reporting Information [Line Items]
Percentage of revenues contributed by major customers	13.10%	10.50%	12.30%	10.70%