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Summary of Significant Accounting Policies - Comprehensive Income (Loss) by Component (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Apr. 30, 2022 | Apr. 30, 2021 | Apr. 30, 2022 | Apr. 30, 2021
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |
Net Amount |  |  | $ (806) | $ 1,640
Foreign currency translation adjustments |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |
Pre-tax Amount | $ (1,006) | $ 577 | (951) | 1,372
Tax Expense | 0 | 0 | 0 | 0
Net Amount | (1,006) | 577 | (951) | 1,372
Other comprehensive gain before reclassifications |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |
Pre-tax Amount | 100 | 184 | 199 | 368
Tax Expense | (27) | (50) | (54) | (100)
Net Amount | 73 | 134 | 145 | 268
Other comprehensive (loss) income |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |
Pre-tax Amount | (906) | 761 | (752) | 1,740
Tax Expense | (27) | (50) | (54) | (100)
Net Amount | $ (933) | $ 711 | $ (806) | $ 1,640

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