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Note 7 - Commitments and Contingent Liabilities (Details Textual) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended | 175 Months Ended
--- | --- | --- | ---
Jul. 31, 2023 | Jul. 31, 2023 | Jul. 31, 2023
Great Notch Condominium Claims[Member] |  |  |
Loss Contingency, Damages Sought, Value | $ 119.5 | $ 119.5 |
Spill Fund Lawsuit [Member] |  |  |
Loss Contingency, Damages Sought, Value |  |  | $ 5.3

X
- Definition The value (monetary amount) of the award the plaintiff seeks in the legal matter. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 450 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org//1943274/2147483076/450-20-50-1 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 450 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147483076/450-20-50-4 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 450 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 9 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147483076/450-20-50-9 + Details
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- Details
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Namespace Prefix: |
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- Details
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Namespace Prefix: |
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Balance Type: |
Period Type: |