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Summary of financial information related to RF Neulink (Detail) - USD ($)
$ in Thousands
12 Months Ended
Oct. 31, 2017
Oct. 31, 2016
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]    
Royalties $ 174 $ 57
Provision (benefit) for income taxes 68 (33)
Income (loss) from discontinued operations, net of tax 116 (58)
Bioconnect division [Member]    
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]    
Income (loss) from discontinued operations, net of tax $ 10 $ (148)