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INVESTMENTS (Details) - Components of Company's Equity Securities Measured at Fair Value - USD ($) $ in Thousands | Mar. 31, 2021 | Jun. 30, 2020
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Equity - International [Member] |  |
Equity securities at fair value |  |
Securities, Cost | $ 2,147 | $ 5,641
Securities, Unrealized Gains (Losses) | 15,634 | (1,162)
Securities, Fair Value | 17,781 | 4,479
Equity- Domestic [Member] |  |
Equity securities at fair value |  |
Securities, Cost | 45 | 45
Securities, Unrealized Gains (Losses) | (45) | (45)
Securities, Fair Value | 0 | 0
Fixed Income Securities [Member] |  |
Equity securities at fair value |  |
Securities, Cost | 6,313 | 6,313
Securities, Unrealized Gains (Losses) | 9 | 9
Securities, Fair Value | 6,322 | 6,322
Mutual Funds, Global Equity [Member] |  |
Equity securities at fair value |  |
Securities, Cost | 929 | 0
Securities, Unrealized Gains (Losses) | (75) | 0
Securities, Fair Value | 854 | 0
Mutual Funds, Domestic Equity [Member] |  |
Equity securities at fair value |  |
Securities, Cost | 0 | 929
Securities, Unrealized Gains (Losses) | 0 | (266)
Securities, Fair Value | 0 | 663
Equity Securities [Member] |  |
Equity securities at fair value |  |
Securities, Cost | 9,434 | 12,928
Securities, Unrealized Gains (Losses) | 15,523 | (1,464)
Securities, Fair Value | $ 24,957 | $ 11,464

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