LEASES (Details) - USD ($) $ in Millions	3 Months Ended
	Jan. 31, 2020	Jan. 31, 2019
LEASES
Lease, Practical Expedient, Use of Hindsight [true false]	false
Operating lease expense	$ 1.3	$ 1.2
Weighted-average remaining term	4 years
Weighted-average discount rate	1.50%
Minimum
LEASES
Lease term (in years)	2 years
Maximum
LEASES
Lease term (in years)	5 years