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Note 4 - Leases (Details Textual)
$ in Millions
12 Months Ended
Oct. 31, 2023
USD ($)
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability $ 19.8
Lessee, Operating Lease, Lease Not Yet Commenced 3.2
Increase (Decrease) in Operating Lease Liability $ 19.8
Minimum [Member] | Office Leases [Member]  
Lessee, Operating Lease, Term of Contract (Year) 3 years
Maximum [Member] | Office Leases [Member]  
Lessee, Operating Lease, Term of Contract (Year) 5 years