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Discontinued Operations - Additional Information (Detail) (RF Neulink, USD $)
9 Months Ended
Jul. 31, 2013
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]  
Royalty revenue $ 450,000
Fair value of inventory 0
Inventory write-down $ 297,000
Maximum
 
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]  
Concentration Risk, Percentage 10.00%
Minimum
 
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]  
Concentration Risk, Percentage 5.00%