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LEASES (Details) - USD ($)
$ in Millions
6 Months Ended
Apr. 30, 2022
Apr. 30, 2021
LEASES    
Operating lease expense $ 2.6 $ 2.6
Weighted-average remaining term 3 years 7 months 6 days  
Weighted-average discount rate 1.80%  
Minimum    
LEASES    
Lease term (in years) 2 years  
Maximum    
LEASES    
Lease term (in years) 5 years