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Note 2 - Investments - Schedule of Investments (Details) - USD ($) $ in Thousands | Mar. 31, 2022 | Jun. 30, 2021
--- | --- | ---
Debt Securities, Available-for-sale, Adjusted Cost | $ 27,372 | $ 27,374
Debt Securities, Available-for-sale, Unrealized Gain | 0 | 0
Debt Securities, Available-for-sale, Unrealized Loss | (792) | (23)
Debt Securities, Available-for-sale, Fair Value | 26,580 | 27,351
Corporate & Government Debt Securities [Member] | Mutual Fund [Member] |  |
Debt Securities, Available-for-sale, Adjusted Cost | 19,997 | 19,998
Debt Securities, Available-for-sale, Unrealized Gain | 0 | 0
Debt Securities, Available-for-sale, Unrealized Loss | (510) | (13)
Debt Securities, Available-for-sale, Fair Value | 19,487 | 19,985
Corporate & Government Debt Securities [Member] | Exchange Traded Funds [Member] |  |
Debt Securities, Available-for-sale, Adjusted Cost | 7,375 | 7,376
Debt Securities, Available-for-sale, Unrealized Gain | 0 | 0
Debt Securities, Available-for-sale, Unrealized Loss | (282) | (10)
Debt Securities, Available-for-sale, Fair Value | $ 7,093 | $ 7,366

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- Definition Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=126970911&loc=d3e27161-111563 + Details
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