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SUBSEQUENT EVENT (Details) - USD ($) $ in Thousands | 1 Months Ended |  |
--- | --- | --- | ---
May 31, 2018 | Mar. 31, 2018 | Jun. 30, 2017
SUBSEQUENT EVENT (Details) [Line Items] |  |  |  |
Available-for-sale Securities | [1],[2] |  | $ 12,951 | $ 3,401
Corporate Debt Securities [Member] |  |  |  |
SUBSEQUENT EVENT (Details) [Line Items] |  |  |  |
Available-for-sale Securities | [2],[3] |  | $ 1,711 | $ 1,469
Subsequent Event [Member] | Note Receivable #1 [Member] |  |  |  |
SUBSEQUENT EVENT (Details) [Line Items] |  |  |  |
Proceeds from Collection of Notes Receivable |  | $ 2,000 |  |
[1] | Net unrealized gains (losses) on available-for-sale securities gross and net of tax as of March 31, 2018, are $7,917 and $6,430, respectively, and as of June 30, 2017, are $461 and $461, respectively.
[2] | Unrealized and realized gains and losses on trading securities are included in earnings in the statement of operations.
[3] | Corporate debt has stated maturity in 2024, but issuer has issued notice that it intends to redeem early, as discussed below and in Note 12, Subsequent Events.

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