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v3.8.0.1

Other current assets - Additional Information (Detail) - USD ($) | 12 Months Ended
--- | ---
Oct. 31, 2017 | Oct. 31, 2016
Increase (Decrease) In Other Noncurrent Assets | $ (71,000) | $ 102,000
Notes Receivable [Member] |  |
Increase (Decrease) In Other Noncurrent Assets | $ 0 | $ 21,000

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- Definition Amount of increase (decrease) in noncurrent assets classified as other. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |