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Note 9 - Leases - Lease Cost (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Jul. 31, 2021
Jul. 31, 2020
Jul. 31, 2021
Jul. 31, 2020
Oct. 31, 2020
Operating lease cost $ 2,760 $ 2,621 $ 7,970 $ 7,837  
Cash payments on lease liabilities $ 2,483 $ 2,266 $ 7,171 $ 6,890  
Weighted-average remaining lease term (in years) (Year) 3 years 1 month 6 days   3 years 1 month 6 days   3 years 6 months
Weighted-average discount rate (incremental borrowing rate) 9.40%   9.40%   9.60%
Prepaid Expenses and Other Current Assets [Member]          
ROU assets $ 18,108   $ 18,108   $ 20,016
Accounts Payable and Accrued Liabilities [Member]          
Lease liabilities $ 19,135   $ 19,135   $ 21,049