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Note 18 - Contingencies and Commitments (Details Textual) - USD ($) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2023 | Sep. 30, 2023 | Jun. 30, 2023 | Jun. 30, 2022
Loss Contingency Accrual, Provision |  |  | $ 0 | $ 0
Dividends, Common Stock, Cash |  |  | $ 1,325,000 | $ 1,350,000
Forecast [Member] |  |  |  |
Common Stock, Dividends, Per Share, Declared (in dollars per share) | $ 0.0075 |  |  |
Monthly Dividend [Member] | Forecast [Member] |  |  |  |
Common Stock, Dividends, Per Share, Declared (in dollars per share) |  | $ 0.0075 |  |
Dividends, Common Stock, Cash |  | $ 329,000 |  |

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- Definition Aggregate dividends declared during the period for each share of common stock outstanding. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 505 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480008/505-10-S99-1 + Details
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- Definition Amount of paid and unpaid common stock dividends declared with the form of settlement in cash. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 505 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480008/505-10-S99-1 + Details
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- Definition Amount charged against operating income increasing loss contingency liability, after adjustments to reduce previously estimated charges. + 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 + Details
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