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Sales by geographic area (Detail) - USD ($) $ in Thousands | 12 Months Ended
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Oct. 31, 2016 | Oct. 31, 2015
Revenue, Major Customer [Line Items] |  |
Sales revenue | $ 30,241 | $ 30,908
United States |  |
Revenue, Major Customer [Line Items] |  |
Sales revenue | 29,257 | 29,732
Canada |  |
Revenue, Major Customer [Line Items] |  |
Sales revenue | 509 | 362
Israel |  |
Revenue, Major Customer [Line Items] |  |
Sales revenue | 63 | 296
Mexico |  |
Revenue, Major Customer [Line Items] |  |
Sales revenue | 234 | 395
All other |  |
Revenue, Major Customer [Line Items] |  |
Sales revenue | 178 | 123
Foreign countries, total |  |
Revenue, Major Customer [Line Items] |  |
Sales revenue | $ 984 | $ 1,176

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