SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Available-For-Sale Marketable Securities) (Detail) - USD ($) $ in Thousands	Jun. 30, 2019	Jun. 30, 2018
Gross Unrealized Cost	$ 7,848	$ 3,718
Gross Unrealized (Loss)	0	0
Gross Unrealized Gain	832	537
Gross Unrealized Fair Value	8,680	4,255
Bond Mutual Fund [Member]
Gross Unrealized Cost	2,099	1,137
Gross Unrealized (Loss)	0	0
Gross Unrealized Gain	130	32
Gross Unrealized Fair Value	2,229	1,169
Stock Mutual Funds [Member]
Gross Unrealized Cost	5,749	2,581
Gross Unrealized (Loss)	0	0
Gross Unrealized Gain	702	505
Gross Unrealized Fair Value	$ 6,451	$ 3,086