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Business activities and summary of significant accounting policies - Additional Information (Detail) - USD ($)
 12 Months Ended
Oct. 31, 2015
Oct. 31, 2014
Business Activities And Summary Of Significant Accounting Policies [Line Items]    
Amortization of Intangible Assets $ 598,000 $ 220,000
Advertising Expense 152,000 147,000
Research and Development Expense 923,000 948,000
Stock based compensation expense $ 232,000 $ 390,000
Shares excluded from computation of diluted per share amount 792,386 328,569
Earn-out Payment $ 1,360,000 $ 800,000
Maximum    
Business Activities And Summary Of Significant Accounting Policies [Line Items]    
Property, Plant and Equipment, Useful Life 5 years  
Minimum    
Business Activities And Summary Of Significant Accounting Policies [Line Items]    
Property, Plant and Equipment, Useful Life 3 years  
Selling General and Engineering Expenses    
Business Activities And Summary Of Significant Accounting Policies [Line Items]    
Stock based compensation expense $ 179,000 323,000
Cost of Sales    
Business Activities And Summary Of Significant Accounting Policies [Line Items]    
Stock based compensation expense $ 53,000 $ 67,000