SUBSEQUENT EVENTS (Details) - USD ($) $ in Thousands	1 Months Ended		3 Months Ended		9 Months Ended
	Aug. 31, 2018	Jul. 31, 2018	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Subsequent Event [Line Items]
Sale of interest in leasehold land			$ 1,310	$ 0	$ 1,310	$ 1,678
Kaupulehu Developments
Subsequent Event [Line Items]
Sale of interest in leasehold land			$ 1,310	$ 0	$ 1,310	$ 1,678
Kaupulehu Developments | Subsequent Event
Subsequent Event [Line Items]
Sale of interest in leasehold land		$ 165
Kaupulehu 2007, LLLP | Subsequent Event
Subsequent Event [Line Items]
Proceeds from sale of property held-for-sale	$ 1,000
Purchase and Sale Agreement | Subsequent Event
Subsequent Event [Line Items]
Collaborative agreement, non-refundable deposit, percentage		5.00%
Collaborative agreement, non-refundable deposit, amount		$ 525
Purchase and Sale Agreement | Barnwell Industries Inc | Subsequent Event
Subsequent Event [Line Items]
Collaborative agreement, purchase price		$ 10,500