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INVESTMENTS (Details) - Summary of Gross Unrealized Losses and Fiar Value of Available-for-Sale Investments - USD ($) $ in Thousands | Dec. 31, 2017 | Jun. 30, 2017
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Available-for-sale securities |  |
Available-for-sale securities, continuous unrealized loss position, less than 12 months, fair value | $ 995 | $ 0
Available-for-sale securities, continuous unrealized loss position, less than 12 months, gross unrealized loss | (5) | 0
Available-for-sale securities, continuous unrealized loss position, 12 months or greater, fair value | 0 | 95
Available-for-sale securities, continuous unrealized loss position, 12 months or greater, gross unrealized loss | 0 | (5)
Available-for-sale securities, continuous unrealized loss position, fair value, total | 995 | 95
Available-for-sale securities, continuous unrealized loss position, gross unrealized losses, total | (5) | (5)
Common Stock - Domestic [Member] |  |
Available-for-sale securities |  |
Available-for-sale securities, continuous unrealized loss position, less than 12 months, fair value | 0 | 0
Available-for-sale securities, continuous unrealized loss position, less than 12 months, gross unrealized loss | 0 | 0
Available-for-sale securities, continuous unrealized loss position, 12 months or greater, fair value | 0 | 0
Available-for-sale securities, continuous unrealized loss position, 12 months or greater, gross unrealized loss | 0 | 0
Available-for-sale securities, continuous unrealized loss position, fair value, total | 0 | 0
Available-for-sale securities, continuous unrealized loss position, gross unrealized losses, total | 0 | 0
Common Stock - International [Member] |  |
Available-for-sale securities |  |
Available-for-sale securities, continuous unrealized loss position, less than 12 months, fair value | 0 | 0
Available-for-sale securities, continuous unrealized loss position, less than 12 months, gross unrealized loss | 0 | 0
Available-for-sale securities, continuous unrealized loss position, 12 months or greater, fair value | 0 | 0
Available-for-sale securities, continuous unrealized loss position, 12 months or greater, gross unrealized loss | 0 | 0
Available-for-sale securities, continuous unrealized loss position, fair value, total | 0 | 0
Available-for-sale securities, continuous unrealized loss position, gross unrealized losses, total | 0 | 0
Corporate Debt Securities [Member] |  |
Available-for-sale securities |  |
Available-for-sale securities, continuous unrealized loss position, less than 12 months, fair value | 0 | 0
Available-for-sale securities, continuous unrealized loss position, less than 12 months, gross unrealized loss | 0 | 0
Available-for-sale securities, continuous unrealized loss position, 12 months or greater, fair value | 0 | 0
Available-for-sale securities, continuous unrealized loss position, 12 months or greater, gross unrealized loss | 0 | 0
Available-for-sale securities, continuous unrealized loss position, fair value, total | 0 | 0
Available-for-sale securities, continuous unrealized loss position, gross unrealized losses, total | 0 | 0
Fixed Income Securities [Member] |  |
Available-for-sale securities |  |
Available-for-sale securities, continuous unrealized loss position, less than 12 months, fair value | 995 | 0
Available-for-sale securities, continuous unrealized loss position, less than 12 months, gross unrealized loss | (5) | 0
Available-for-sale securities, continuous unrealized loss position, 12 months or greater, fair value | 0 | 95
Available-for-sale securities, continuous unrealized loss position, 12 months or greater, gross unrealized loss | 0 | (5)
Available-for-sale securities, continuous unrealized loss position, fair value, total | 995 | 95
Available-for-sale securities, continuous unrealized loss position, gross unrealized losses, total | (5) | (5)
Mutual Funds, Domestic Equity [Member] |  |
Available-for-sale securities |  |
Available-for-sale securities, continuous unrealized loss position, less than 12 months, fair value | 0 | 0
Available-for-sale securities, continuous unrealized loss position, less than 12 months, gross unrealized loss | 0 | 0
Available-for-sale securities, continuous unrealized loss position, 12 months or greater, fair value | 0 | 0
Available-for-sale securities, continuous unrealized loss position, 12 months or greater, gross unrealized loss | 0 | 0
Available-for-sale securities, continuous unrealized loss position, fair value, total | 0 | 0
Available-for-sale securities, continuous unrealized loss position, gross unrealized losses, total | 0 | 0
Other Securities [Member] |  |
Available-for-sale securities |  |
Available-for-sale securities, continuous unrealized loss position, less than 12 months, fair value | 0 | 0
Available-for-sale securities, continuous unrealized loss position, less than 12 months, gross unrealized loss | 0 | 0
Available-for-sale securities, continuous unrealized loss position, 12 months or greater, fair value | 0 | 0
Available-for-sale securities, continuous unrealized loss position, 12 months or greater, gross unrealized loss | 0 | 0
Available-for-sale securities, continuous unrealized loss position, fair value, total | 0 | 0
Available-for-sale securities, continuous unrealized loss position, gross unrealized losses, total | $ 0 | $ 0

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- Definition Amount of accumulated unrealized loss on investments in debt and equity securities classified as available-for-sale that have been in a continuous loss position for twelve months or longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 6 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27290-111563 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27337-111563 + Details
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