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Restructuring and Impairment - Additional Information (Details) |  |  |  | 12 Months Ended
--- | --- | --- | --- | ---
Apr. 12, 2019 USD ($) Employee | Nov. 30, 2016 MW | Nov. 29, 2016 MW | Oct. 31, 2019 USD ($) Rate | Oct. 31, 2018 USD ($) | Oct. 31, 2017 USD ($)
Restructuring Cost And Reserve [Line Items] |  |  |  |  |  |
Reduction in force of employess | Employee | 135 |  |  |  |  |
Reduction in force of employee percentage | 30.00% |  |  |  |  |
Restructuring charges | $ 0 |  |  |  | $ 0 | $ 1,355,000
Business restructuring, date |  |  |  | Nov. 30, 2016 |  |
Restructuring and Related Cost, Expected Number of Positions Eliminated |  |  |  | 96 |  |
Restructuring and Related Cost, Number of Positions Eliminated, Inception to Date Percent | Rate |  |  |  | 17.00% |  |
Restructuring activity, production rate | MW |  | 25 | 50 |  |  |
Product Sales [Member] |  |  |  |  |  |
Restructuring Cost And Reserve [Line Items] |  |  |  |  |  |
Restructuring charges |  |  |  | $ 2,800,000 |  |

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