Note 9 - Leases - Lease Cost (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jul. 31, 2022	Jul. 31, 2021	Jul. 31, 2022	Jul. 31, 2021	Oct. 31, 2021
Operating lease cost	$ 2,528	$ 2,760	$ 7,793	$ 7,970
Cash payments on lease liabilities	$ 2,432	$ 2,483	$ 7,086	$ 7,171
Weighted-average remaining lease term (in years) (Year)	3 years 6 months		3 years 6 months		3 years 1 month 6 days
Weighted-average discount rate (incremental borrowing rate)	9.50%		9.50%		9.40%
Prepaid Expenses and Other Current Assets [Member]
ROU assets	$ 18,898		$ 18,898		$ 17,844
Accounts Payable and Accrued Liabilities [Member]
Lease liabilities	$ 19,940		$ 19,940		$ 18,952