SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Available-For-Sale Marketable Securities) (Detail) - USD ($) $ in Thousands	Jun. 30, 2018	Jun. 30, 2017
Gross Unrealized Cost	$ 3,718	$ 3,560
Gross Unrealized (Loss)	0	0
Gross Unrealized Gain	537	453
Gross Unrealized Fair Value	4,255	4,013
Bond Mutual Fund [Member]
Gross Unrealized Cost	1,137	1,112
Gross Unrealized (Loss)	0	0
Gross Unrealized Gain	32	64
Gross Unrealized Fair Value	1,169	1,176
Stock Mutual Funds [Member]
Gross Unrealized Cost	2,581	2,448
Gross Unrealized (Loss)	0	0
Gross Unrealized Gain	505	389
Gross Unrealized Fair Value	$ 3,086	$ 2,837