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Benefit Plans - Schedule of Share-Based Compensation Reflected in Consolidated Statement of Operations and Comprehensive Loss (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Jul. 31, 2021 | Jul. 31, 2020 | Jul. 31, 2021 | Jul. 31, 2020
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items] |  |  |  |
Allocated Share-based Compensation Expense | $ 872 | $ 390 | $ 3,487 | $ 1,226
Costs of revenues |  |  |  |
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items] |  |  |  |
Allocated Share-based Compensation Expense | 133 | 46 | 449 | 267
General and Administrative Expenses [Member] |  |  |  |
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items] |  |  |  |
Allocated Share-based Compensation Expense | 706 | 338 | 2,941 | 919
Research and Development Expense [Member] |  |  |  |
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items] |  |  |  |
Allocated Share-based Compensation Expense | $ 33 | $ 6 | $ 97 | $ 40

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