Inventories and major vendors - Additional Information (Detail)	3 Months Ended		3 Months Ended
	Jan. 31, 2013	Jan. 31, 2014	Jan. 31, 2014 Vendor One	Jan. 31, 2014 Vendor Two
Schedule of Inventory [Line Items]
Purchases of connector products, percentage	10.00%		19.00%	15.00%
Number of major vendors		2