COMMITMENTS AND CONTINGENCIES (Detail) - USD ($)	12 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
Operating leases
Rental expense	$ 408,000	$ 548,000
Minimum rental payments
2016	282,000
2017	247,000
2018	136,000
2019	116,000
2020	116,000
Thereafter through 2026	245,000
Total	1,142,000
Commitments and contingencies
Probable environmental remediation costs	$ 2,300,000
Percentage of working interest	58.00%
Insurance deductible	$ 80,000
Insurance recoveries	722,000
Estimated recovery from insurance	381,000
Environmental remediation expense	223,000
Accrual for environmental remediation costs	$ 75,000
Kaupulehu Developments
Commitments and contingencies
Fees to be paid to Nearco	10.40%
Percentage of Increment II receipts to be paid to external real estate counsel for services provided in the negotiation and closing of the Increment II transaction	1.50%
Amounts paid pursuant to the arrangement	$ 0	$ 0