Note 14 - Cash Dividend and Declared Dividends (Details Textual) - USD ($)	3 Months Ended	6 Months Ended
Apr. 30, 2020	Apr. 30, 2019	Apr. 30, 2020	Apr. 30, 2019
Common Stock, Dividends, Per Share, Cash Paid (in dollars per share)	$ 0.02	$ 0.02	$ 0.02	$ 0.02
Payments of Ordinary Dividends, Common Stock	$ 195,000	$ 187,000	$ 388,000	$ 373,000

Amount of cash outflow in the form of ordinary dividends to common shareholders of the parent entity.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 15
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3291-108585

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration