FAIR VALUE MEASUREMENTS (Details) - USD ($)	Mar. 31, 2016	Jun. 30, 2015
Assets:
Investment in marketable securities	$ 13,363,000	$ 5,827,000
Fair Value, Measurements, Recurring [Member]
Assets:
Other investments - warrants		104,000
Investment in marketable securities	13,363,000	5,827,000
Assets, Fair Value Disclosure		5,931,000
Fair Value, Inputs, Level 1 [Member] | Fair Value, Measurements, Recurring [Member]
Assets:
Other investments - warrants		0
Investment in marketable securities	13,363,000	5,827,000
Assets, Fair Value Disclosure		5,827,000
Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Recurring [Member]
Assets:
Other investments - warrants		104,000
Investment in marketable securities	0	0
Assets, Fair Value Disclosure		104,000
Basic Materials [Member] | Fair Value, Measurements, Recurring [Member]
Assets:
Investment in marketable securities	10,018,000	2,761,000
Basic Materials [Member] | Fair Value, Inputs, Level 1 [Member] | Fair Value, Measurements, Recurring [Member]
Assets:
Investment in marketable securities	10,018,000	2,761,000
Basic Materials [Member] | Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Recurring [Member]
Assets:
Investment in marketable securities	0	0
Other [Member] | Fair Value, Measurements, Recurring [Member]
Assets:
Investment in marketable securities	3,345,000	3,066,000
Other [Member] | Fair Value, Inputs, Level 1 [Member] | Fair Value, Measurements, Recurring [Member]
Assets:
Investment in marketable securities	3,345,000	3,066,000
Other [Member] | Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Recurring [Member]
Assets:
Investment in marketable securities	$ 0	$ 0