FAIR VALUE MEASUREMENTS (Details) - USD ($)	Jun. 30, 2018	Jun. 30, 2017
Debt Securities, Trading, and Equity Securities, FV-NI [Abstract]
Investment in marketable securities	$ 2,507,000	$ 3,861,000
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | REITs And Real Estate Companies [Member]
Debt Securities, Trading, and Equity Securities, FV-NI [Abstract]
Investment in marketable securities	757,000
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Basis Materials [Member]
Debt Securities, Trading, and Equity Securities, FV-NI [Abstract]
Investment in marketable securities	462,000	1,816,000
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Energy [Member]
Debt Securities, Trading, and Equity Securities, FV-NI [Abstract]
Investment in marketable securities		411,000
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Healthcare [Member]
Debt Securities, Trading, and Equity Securities, FV-NI [Abstract]
Investment in marketable securities	424,000
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Technology [Member]
Debt Securities, Trading, and Equity Securities, FV-NI [Abstract]
Investment in marketable securities		918,000
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Other [Member]
Debt Securities, Trading, and Equity Securities, FV-NI [Abstract]
Investment in marketable securities	$ 864,000	$ 716,000