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Income tax provision (Summary Of Income Tax Contingencies) (Detail) - USD ($) $ in Thousands | 12 Months Ended
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Oct. 31, 2019 | Oct. 31, 2018
Income tax provision |  |
Unrecognized Tax Benefits, Beginning Balance | $ 59 | $ 0
Increase for tax positions related to the current year | 23 | 24
Increase for tax positions related to prior years | 3 | 29
Increase for interest and penalties | 2 | 6
Statute of Limitations Expirations | (7) | 0
Unrecognized Tax Benefits, Ending Balance | $ 80 | $ 59

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