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Marketable Securities - Investments (Details) - Mutual Funds - Level 1 - USD ($) $ in Thousands | Jun. 30, 2023 | Jun. 30, 2022
--- | --- | ---
Net Investment Income [Line Items] |  |
Cost | $ 5,651 | $ 5,504
Fair Value | 5,136 | 5,068
Unrealized Gain (Loss) | $ (515) | $ (436)

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