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Revenue Recognition - Additional Information (Details) - USD ($) | 12 Months Ended |  |
--- | --- | --- | ---
Oct. 31, 2020 | Oct. 31, 2019 | Nov. 01, 2019 | Nov. 01, 2018
Disaggregation Of Revenue [Line Items] |  |  |  |
Contract asset | $ 16,900,000 | $ 11,300,000 |  |
Transferred to accounts receivable | 5,900,000 | 6,600,000 |  |
Contract liability | 41,900,000 | 40,200,000 |  |
Accumulated deficit | (1,164,196,000) | (1,075,089,000) | $ 0 |
Topic 606 [Member] |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Accumulated deficit |  | $ (9,300,000) |  | $ (6,600,000)
Service Agreements [Member] |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Remaining performance obligations | 146,800,000 |  |  |
Licensing Agreements [Member] |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Remaining performance obligations | 22,200,000 |  |  |
Advanced Technologies Contracts [Member] |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Remaining performance obligations | 49,200,000 |  |  |
Posco Energy |  |  |  |
Disaggregation Of Revenue [Line Items] |  |  |  |
Deferred revenue | $ 22,200,000 |  |  |

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