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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, 2021 | Apr. 30, 2020 | Apr. 30, 2021 | Apr. 30, 2020
Foreign Currency Translation (Loss) Income |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |
Pre-tax Amount | $ 577 | $ (619) | $ 1,372 | $ (1,886)
Tax Expense | 0 | 0 | 0 | 0
Net Amount | 577 | (619) | 1,372 | (1,886)
Defined Benefit Pension Plan |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |
Pre-tax Amount | 184 | 110 | 368 | 295
Tax Expense | (50) | (50) | (100) | (100)
Net Amount | 134 | 60 | 268 | 195
Amounts reclassified to earnings included in "Selling, general and administrative" |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |
Pre-tax Amount | 0 | 140 | 0 | 140
Tax Expense | 0 | 0 | 0 | 0
Net Amount | 0 | 140 | 0 | 140
Accumulated Other Comprehensive (Loss) Income |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |
Pre-tax Amount | 761 | (369) | 1,740 | (1,451)
Tax Expense | (50) | (50) | (100) | (100)
Net Amount | $ 711 | $ (419) | $ 1,640 | $ (1,551)

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