Segment Disclosure - Additional information (Detail)	3 Months Ended		6 Months Ended
	Apr. 30, 2014 Segment Customer	Apr. 30, 2013 Customer Segment	Apr. 30, 2014 Customer Segment	Apr. 30, 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
Revenue
Segment Reporting Information [Line Items]
Percentage of revenues contributed by major customers	10.00%	11.60%	10.80%	11.40%