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Basis of Presentation - Additional Information (Detail)
$ in Millions
3 Months Ended 6 Months Ended
May 08, 2020
Business
Apr. 30, 2020
Apr. 30, 2020
USD ($)
Apr. 30, 2019
USD ($)
Apr. 30, 2020
USD ($)
Apr. 30, 2019
USD ($)
Subsequent Event [Member]            
Organization Consolidation And Presentation Of Financial Statements [Line Items]            
Number of shuttle bus business sold | Business 2          
Primary Equity Holder [Member]            
Organization Consolidation And Presentation Of Financial Statements [Line Items]            
Selling, general and administrative expenses charged by primary equity holder     $ 0.0 $ 0.1 $ 0.1 $ 0.6
Management [Member]            
Organization Consolidation And Presentation Of Financial Statements [Line Items]            
Rent expense     $ 0.1 $ 0.5 $ 0.6 $ 1.0
American Industrial Partners [Member]            
Organization Consolidation And Presentation Of Financial Statements [Line Items]            
Equity interest held by operating partnership, voting equity   53.30%