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Basis of Presentation and Significant Accounting Policies - Prepaid Expenses and Other Current Assets (Details) - USD ($)
$ in Millions
Oct. 31, 2020
Oct. 31, 2019
Basis of Presentation and Significant Accounting Policies    
Non-trade receivables $ 5.7 $ 5.3
Mexican IVA 1.5 1.9
Prepaid expenses $ 4.2 $ 3.4