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Inventories and major vendors - Additional Information (Detail)
 6 Months Ended
Apr. 30, 2014
Apr. 30, 2013
Schedule of Inventory [Line Items]    
Number of major vendors 3  
Vendor One
    
Schedule of Inventory [Line Items]    
Purchases of connector products, percentage 18.00% 35.00%
Vendor Two
    
Schedule of Inventory [Line Items]    
Purchases of connector products, percentage 13.00% 17.00%
Vendor Three
    
Schedule of Inventory [Line Items]    
Purchases of connector products, percentage 10.00% 10.00%