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INVESTMENTS (Details) - Components of Company's Equity Securities Measured at Fair Value - USD ($) $ in Thousands | Jun. 30, 2019 | Jun. 30, 2018
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INVESTMENTS (Details) - Components of Company's Equity Securities Measured at Fair Value [Line Items] |  |  |
Securities, Cost |  | $ 14,640 |
Securities, Unrealized Gains (Losses) |  | 547 |
Securities, Fair Value |  | 15,187 |
Trading securities, Cost | [1] |  | $ 8,365
Trading securities, Fair Value | [1] |  | 8,179
Trading securities, Unrealized Gains | [1] |  | 22
Trading securities, Unrealized (Losses) | [1] |  | (208)
Available-for-sale securities, Cost | [2],[3] |  | 3,948
Available-for-sale securities, Fair Value | [2],[3] |  | 7,086
Available-for-sale securities, Unrealized Gains | [2],[3] |  | 3,241
Available-for-sale securities, Unrealized (Losses) | [2],[3] |  | (103)
Total securities at fair value, Cost |  |  | 12,313
Total securities at fair value, Fair Value |  |  | 15,265
Total securities at fair value, Unrealized Gains |  |  | 3,263
Total securities at fair value, Unrealized (Losses) |  |  | (311)
Common Stock - International [Member] |  |  |
INVESTMENTS (Details) - Components of Company's Equity Securities Measured at Fair Value [Line Items] |  |  |
Securities, Cost |  | 5,641 |
Securities, Unrealized Gains (Losses) |  | 790 |
Securities, Fair Value |  | 6,431 |
Available-for-sale securities, Cost | [3] |  | 2,554
Available-for-sale securities, Fair Value | [3] |  | 5,673
Available-for-sale securities, Unrealized Gains | [3] |  | 3,213
Available-for-sale securities, Unrealized (Losses) | [3] |  | (94)
Common Stock - Domestic [Member] |  |  |
INVESTMENTS (Details) - Components of Company's Equity Securities Measured at Fair Value [Line Items] |  |  |
Securities, Cost | [1] | 45 |
Securities, Unrealized Gains (Losses) | [1] | (45) |
Securities, Fair Value | [1] | 0 |
Fixed Income Securities [Member] |  |  |
INVESTMENTS (Details) - Components of Company's Equity Securities Measured at Fair Value [Line Items] |  |  |
Securities, Cost | [1] | 8,025 |
Securities, Unrealized Gains (Losses) | [1] | (4) |
Securities, Fair Value | [1] | 8,021 |
Trading securities, Cost | [1] |  | 7,785
Trading securities, Fair Value | [1] |  | 7,807
Trading securities, Unrealized Gains | [1] |  | 22
Trading securities, Unrealized (Losses) | [1] |  | 0
Available-for-sale securities, Cost | [3] |  | 1,000
Available-for-sale securities, Fair Value | [3] |  | 991
Available-for-sale securities, Unrealized Gains | [3] |  | 0
Available-for-sale securities, Unrealized (Losses) | [3] |  | (9)
Mutual Funds, Domestic Equity [Member] |  |  |
INVESTMENTS (Details) - Components of Company's Equity Securities Measured at Fair Value [Line Items] |  |  |
Securities, Cost | [1] | 929 |
Securities, Unrealized Gains (Losses) | [1] | (194) |
Securities, Fair Value | [1] | $ 735 |
Trading securities, Cost | [1] |  | 535
Trading securities, Fair Value | [1] |  | 372
Trading securities, Unrealized Gains | [1] |  | 0
Trading securities, Unrealized (Losses) | [1] |  | (163)
Available-for-sale securities, Cost | [3] |  | 394
Available-for-sale securities, Fair Value | [3] |  | 422
Available-for-sale securities, Unrealized Gains | [3] |  | 28
Available-for-sale securities, Unrealized (Losses) | [3] |  | 0
Other Securities [Member] |  |  |
INVESTMENTS (Details) - Components of Company's Equity Securities Measured at Fair Value [Line Items] |  |  |
Trading securities, Cost | [1] |  | 45
Trading securities, Fair Value | [1] |  | 0
Trading securities, Unrealized Gains | [1] |  | 0
Trading securities, Unrealized (Losses) | [1] |  | $ (45)
[1] | Prior to July 1, 2018, changes in unrealized and realized gains and losses on trading securities were included in earnings in the statement of operations.
[2] | Net unrealized gains on available-for-sale securities gross and net of tax as of June 30, 2018, were $3,138 and $2,089, respectively.
[3] | Prior to July 1, 2018, changes in unrealized gains and losses on available-for-sale securities were excluded from earnings and recorded in other comprehensive income as a separate component of shareholders' equity until realized.

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