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Leases - Composition of Rental Operations Revenue (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Apr. 30, 2020
Apr. 30, 2020
Leases [Abstract]    
Operating lease revenue $ 1,061 $ 2,157
Variable lease revenue 71 148
Total lease revenue $ 1,132 $ 2,305