INVESTMENTS (Details) - Components of Company's Equity Securities Measured at Fair Value - USD ($) $ in Thousands	Mar. 31, 2020	Jun. 30, 2019
Securities at fair value
Securities, Cost	$ 12,928	$ 14,640
Securities, Unrealized Gains (Losses)	(3,448)	547
Securities, Fair Value	9,480	15,187
Common Stock - International [Member]
Securities at fair value
Securities, Cost	5,641	5,641
Securities, Unrealized Gains (Losses)	(3,034)	790
Securities, Fair Value	2,607	6,431
Common Stock - Domestic [Member]
Securities at fair value
Securities, Cost	45	45
Securities, Unrealized Gains (Losses)	(45)	(45)
Securities, Fair Value	0	0
Fixed Income Securities [Member]
Securities at fair value
Securities, Cost	6,313	8,025
Securities, Unrealized Gains (Losses)	0	(4)
Securities, Fair Value	6,313	8,021
Mutual Funds, Domestic Equity [Member]
Securities at fair value
Securities, Cost	929	929
Securities, Unrealized Gains (Losses)	(369)	(194)
Securities, Fair Value	$ 560	$ 735