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Note 14 - Cash Dividend and Declared Dividends (Details Textual) - USD ($) | 3 Months Ended | 6 Months Ended
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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

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- Definition Aggregate dividends paid during the period for each share of common stock outstanding. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=120397183&loc=d3e187085-122770 + Details
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Namespace Prefix: | us-gaap_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

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- Definition Amount of cash outflow in the form of ordinary dividends to common shareholders of the parent entity. + References 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 + Details
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Namespace Prefix: | us-gaap_
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Balance Type: | credit
Period Type: | duration