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Leases - Lessee Arrangements, Narrative (Details) - USD ($)
$ in Thousands
3 Months Ended
Jan. 31, 2022
Jan. 31, 2021
Lessee, Lease, Description [Line Items]    
Operating lease costs $ 123 $ 142
Minimum    
Lessee, Lease, Description [Line Items]    
Remaining terms of operating leases 1 year  
Maximum    
Lessee, Lease, Description [Line Items]    
Remaining terms of operating leases 16 years