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Related party transactions - Additional Information (Detail) - USD ($)
12 Months Ended
Oct. 31, 2015
Oct. 31, 2014
Related Party Transaction [Line Items]    
Due From Officers Or Stockholders Noncurrent $ 67,000 $ 67,000
Chief Executive Officer [Member]    
Related Party Transaction [Line Items]    
Due From Officers Or Stockholders Noncurrent $ 67,000 67,000
Debt Instrument, Interest Rate During Period 6.00%  
Former Director [Member]    
Related Party Transaction [Line Items]    
Cost of Services $ 41,000 $ 18,000