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Marketable Securities (Details) - USD ($) $ in Thousands | 12 Months Ended
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Jun. 30, 2023 | Jun. 30, 2022 | Jun. 30, 2021
Marketable Securities |  |  |
Net gains recognized during the period on marketable securities | $ 147 | $ 81 |
Unrealized gains (losses) recognized during the reporting period on marketable securities still held at the reporting date | (79) | (426) | $ (9)
Marketable securities | $ 68 | $ (345) | $ (9)

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