Note 9 - Leases (Details Textual) $ in Millions	3 Months Ended
Jan. 31, 2022 USD ($)
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability	$ 6.6
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

Amount of increase in right-of-use asset obtained in exchange for operating lease liability.

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 55
-Paragraph 53
-URI http://asc.fasb.org/extlink&oid=123414884&loc=SL77918982-209971

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (g)(2)
-URI http://asc.fasb.org/extlink&oid=123408670&loc=SL77918686-209980

Name:	us-gaap_RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration