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Note 2 - Investments - Schedule of Investments (Details) - USD ($) $ in Thousands | Dec. 31, 2022 | Jun. 30, 2022
--- | --- | ---
Debt Securities, Available-for-sale, Adjusted Cost | $ 32,522 | $ 27,372
Debt Securities, Available-for-sale, Unrealized Gain | 0 | 0
Debt Securities, Available-for-sale, Unrealized Loss | (1,569) | (1,199)
Debt Securities, Available-for-sale, Fair Value | 30,953 | 26,173
financial instrument, short-term investments | 30,953 | 26,173
Corporate & Government Debt Mutual Funds Securities [Member] |  |
Debt Securities, Available-for-sale, Adjusted Cost | 19,997 | 19,997
Debt Securities, Available-for-sale, Unrealized Gain | 0 | 0
Debt Securities, Available-for-sale, Unrealized Loss | (1,071) | (806)
Debt Securities, Available-for-sale, Fair Value | 18,926 | 19,191
financial instrument, short-term investments | 18,926 | 19,191
Corporate & Government Debt ETFs Securities [Member] |  |
Debt Securities, Available-for-sale, Adjusted Cost | 7,375 | 7,375
Debt Securities, Available-for-sale, Unrealized Gain | 0 | 0
Debt Securities, Available-for-sale, Unrealized Loss | (463) | (393)
Debt Securities, Available-for-sale, Fair Value | 6,912 | 6,982
financial instrument, short-term investments | 6,912 | 6,982
Interest-bearing Time Deposits [Member] |  |
Debt Securities, Available-for-sale, Adjusted Cost | 5,150 | 0
Debt Securities, Available-for-sale, Unrealized Gain | 0 | 0
Debt Securities, Available-for-sale, Unrealized Loss | (35) | 0
Debt Securities, Available-for-sale, Fair Value | 5,115 | 0
financial instrument, short-term investments | $ 5,115 | $ 0

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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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