FAIR VALUE MEASUREMENTS (Details) - USD ($)	Sep. 30, 2015	Jun. 30, 2015
Assets:
Investment in marketable securities	$ 17,733,000	$ 5,827,000
Assets, Fair Value Disclosure	17,802,000	5,931,000
Fair Value, Measurements, Recurring [Member]
Assets:
Other investments - warrants	69,000	104,000
Investment in marketable securities	17,733,000	5,827,000
Fair Value, Inputs, Level 1 [Member]
Assets:
Assets, Fair Value Disclosure	17,733,000	5,827,000
Fair Value, Inputs, Level 1 [Member] | Fair Value, Measurements, Recurring [Member]
Assets:
Other investments - warrants	0	0
Investment in marketable securities	17,733,000	5,827,000
Fair Value, Inputs, Level 2 [Member]
Assets:
Assets, Fair Value Disclosure	0	0
Fair Value, Inputs, Level 2 [Member] | Fair Value, Measurements, Recurring [Member]
Assets:
Other investments - warrants	0	0
Investment in marketable securities	0	0
Fair Value, Inputs, Level 3 [Member]
Assets:
Assets, Fair Value Disclosure	69,000	104,000
Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Recurring [Member]
Assets:
Other investments - warrants	69,000	104,000
Investment in marketable securities	0	0
Basic Materials [Member] | Fair Value, Measurements, Recurring [Member]
Assets:
Investment in marketable securities	16,207,000	2,761,000
Basic Materials [Member] | Fair Value, Inputs, Level 1 [Member] | Fair Value, Measurements, Recurring [Member]
Assets:
Investment in marketable securities	16,207,000	2,761,000
Basic Materials [Member] | Fair Value, Inputs, Level 2 [Member] | Fair Value, Measurements, Recurring [Member]
Assets:
Investment in marketable securities	0	0
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	1,526,000	3,066,000
Other [Member] | Fair Value, Inputs, Level 1 [Member] | Fair Value, Measurements, Recurring [Member]
Assets:
Investment in marketable securities	1,526,000	3,066,000
Other [Member] | Fair Value, Inputs, Level 2 [Member] | Fair Value, Measurements, Recurring [Member]
Assets:
Investment in marketable securities	0	0
Other [Member] | Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Recurring [Member]
Assets:
Investment in marketable securities	$ 0	$ 0