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Note 4 - Investments - Components of Investments (Details) - USD ($) | Jun. 30, 2023 | Jun. 30, 2022
--- | --- | ---
Cost |  | $ 19,601,000 |  | $ 19,967,000
Unrealized gains losses |  | (6,396,000) |  | (5,667,000)
Fair value |  | 13,205,000 |  | 14,300,000
Amortized cost | [1] | 7,729,000 |  | 8,576,000
Unrealized gains | [1] | 1,707,000 |  | 4,588,000
Unrealized losses | [1] | (2,428,000) |  | (2,539,000)
Investments in debt securities | [1] | 7,008,000 | [2] | 10,625,000
Cost | [3] | 1,000,000 |  | 1,000,000
Unrealized gains | [3] | 0 |  | 0
Unrealized losses | [3] | (232,000) |  | (133,000)
Fair value of HTM | [3] | 768,000 |  | 867,000
Equity Securities International [Member] |  |  |  |
Cost |  | 6,679,000 |  | 6,680,000
Unrealized gains losses |  | (5,901,000) |  | (5,141,000)
Fair value |  | 778,000 |  | 1,539,000
Equity Securities Domestic [Member] |  |  |  |
Cost |  | 45,000 |  | 45,000
Unrealized gains losses |  | (45,000) |  | (45,000)
Fair value |  | 0 |  | 0
Mutual Funds Fixed Income [Member] |  |  |  |
Cost |  | 11,947,000 |  | 12,313,000
Unrealized gains losses |  | (305,000) |  | (175,000)
Fair value |  | 11,642,000 |  | 12,138,000
Mutual Funds Global Equity [Member] |  |  |  |
Cost |  | 930,000 |  | 929,000
Unrealized gains losses |  | (145,000) |  | (306,000)
Fair value |  | $ 785,000 |  | $ 623,000
[1] | Changes in unrealized gains and losses are included in the statement of comprehensive income (loss), except for embedded derivatives. Changes in unrealized and realized gains and losses for embedded derivatives are included in earnings in the statement of operations.
[2] | Principal payments of $750,000 are due quarterly with a final maturity in January 2026.
[3] | Held-to-maturity debt instruments are carried at amortized cost, and the fair value is classified as Level 2 according to the fair value hierarchy.

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