Note 9 - Leases - Lease Cost (Details) - USD ($) $ in Thousands	3 Months Ended
	Jan. 31, 2022	Jan. 31, 2021	Oct. 31, 2021
Operating lease cost	$ 2,588	$ 2,616
Cash payments on lease liabilities	$ 2,440	$ 2,298
Weighted-average remaining lease term (in years) (Year)	3 years 7 months 6 days		3 years 1 month 6 days
Weighted-average discount rate (incremental borrowing rate)	9.40%		9.40%
Prepaid Expenses and Other Current Assets [Member]
ROU assets	$ 19,922		$ 17,844
Accounts Payable and Accrued Liabilities [Member]
Lease liabilities	$ 21,004		$ 18,952