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.