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Leases - Lessee Arrangements, Narrative (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Apr. 30, 2022
Apr. 30, 2021
Apr. 30, 2022
Apr. 30, 2021
Lessee, Lease, Description [Line Items]        
Operating lease cost $ 135 $ 136 $ 258 $ 278
Finance lease, cost $ 98 $ 0 $ 156 $ 0
Minimum        
Lessee, Lease, Description [Line Items]        
Remaining terms of operating leases 1 year   1 year  
Maximum        
Lessee, Lease, Description [Line Items]        
Remaining terms of operating leases 16 years   16 years