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

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