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Stockholders' Equity (Detail) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Oct. 31, 2020 | Oct. 31, 2019 | Jul. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Measurement period | 2 years |  | 3 years
Performance shares (PSUs) | Share-based compensation award, tranche two | Minimum |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Vesting percentages | 50.00% |  |
Performance shares (PSUs) | Share-based compensation award, tranche two | Maximum |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Vesting percentages | 150.00% |  |
Performance shares (PSUs) | Share-based compensation award, tranche one |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Vesting percentages | 50.00% |  |
Performance shares (PSUs) | Share-based compensation award, tranche three |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Vesting percentages | 150.00% |  |
Restricted stock units (RSUs) |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Stock-based compensation | $ 5,768 | $ 5,013 |

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