INVESTMENTS (Details) - Components of Company's Equity Securities Measured at Fair Value - USD ($) $ in Thousands	Jun. 30, 2020	Jun. 30, 2019
Securities at fair value
Securities, Cost	$ 12,928	$ 14,640
Securities, Unrealized Gains (Losses)	(1,464)	547
Securities, Fair Value	11,464	15,187
Common Stock - International [Member]
Securities at fair value
Securities, Cost	5,641	5,641
Securities, Unrealized Gains (Losses)	(1,162)	790
Securities, Fair Value	4,479	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)	9	(4)
Securities, Fair Value	6,322	8,021
Mutual Funds, Domestic Equity [Member]
Securities at fair value
Securities, Cost	929	929
Securities, Unrealized Gains (Losses)	(266)	(194)
Securities, Fair Value	$ 663	$ 735