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Note 3 - Investments - Unrealized Gains and Losses (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2023 | Dec. 31, 2022
Net gains and losses recognized during the period |  | $ 358 | $ (937) | $ (904) | $ (2,868)
Less: Net gains and losses recognized during the period on securities sold during the period |  | 79 | 0 | 35 | 0
Net unrealized gains (losses) recognized during the reporting period on securities still held at the reporting date (1) | [1] | 279 | (937) | (939) | (2,868)
Net gains and losses recognized during the period |  | 46 | 0 | 46 | 0
Less: Net gains and losses recognized during the period on securities sold during the period |  | 0 | 0 | 0 | 0
Corporate debt securities |  | $ 46 | $ 0 | $ 46 | $ 0
[1] | Includes net unrealized and realized losses as a result of the measurement alternative of $0 and $775,000 for the three and six months ended December 31, 2023, net unrealized and realized gains of $5,000 for the three months ended December 31, 2022, and net unrealized and realized losses of $1.8 million, for the six months ended December 31, 2022.

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- Definition Amount of unrealized and realized gain (loss) on investment in debt security measured at fair value with change in fair value recognized in net income (FV-NI). + References No definition available. + Details
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- Definition Amount of realized gain (loss) on investment in debt security measured at fair value with change in fair value recognized in net income (trading). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 14 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481800/320-10-50-14 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 220 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(7)(c)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147483621/220-10-S99-2 + Details
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