INVESTMENTS - INVESTMENT IN KUKIO RESORT LAND DEVELOPMENT PARTNERSHIP (Details) $ in Thousands		3 Months Ended		9 Months Ended		12 Months Ended
	Nov. 27, 2013 USD ($) partnership	Jun. 30, 2021 USD ($) lot	Jun. 30, 2020 USD ($)	Jun. 30, 2021 USD ($) lot	Jun. 30, 2020 USD ($)	Sep. 30, 2017 a	Sep. 30, 2016	Sep. 30, 2020 USD ($)	Mar. 07, 2019
Investment Holdings [Line Items]
Equity in income (loss) of affiliates		$ 3,348	$ (111)	$ 5,026	$ (179)
Investment in Kukio Resort Land Development Partnerships		0		0				$ 901
Investment in land development partnerships
Investment Holdings [Line Items]
Number of limited liability limited partnerships formed | partnership	2
Cumulative cash distributions from Kukio Resort Land Development Partnerships made to date				45,000
Cumulative cash distributions from Kukio Resort Land Development Partnerships, partial payment preferred return				459
Cumulative cash distributions from Kukio Resort land development Partnerships, preferred return				656
Cash distribution from equity method investment				5,328	0
Equity in income (loss) of affiliates		3,348	$ (111)	5,026	(179)
Difference between carrying amount and underlying equity		190		190
Basis difference adjustment				94	$ 5
Investment in Kukio Resort Land Development Partnerships		0		0				$ 901
Cumulative cash distributions from the Kukio Resort Land Development Partnerships in excess of our investment balance recorded as income		$ 748		$ 748
K D Kukio Resorts LLLP | Investment in land development partnerships
Investment Holdings [Line Items]
Ownership interest acquired	19.60%
KD Kaupulehu, LLLP | Investment in land development partnerships
Investment Holdings [Line Items]
Ownership interest acquired	19.60%
KD Maniniowali L L L P | Investment in land development partnerships
Investment Holdings [Line Items]
Ownership interest acquired	19.60%
Indirectly Acquired Interest | Investment in land development partnerships
Investment Holdings [Line Items]
Aggregate cost	$ 5,140
KD Acquisition, LLLP | Investment in land development partnerships
Investment Holdings [Line Items]
Ownership interest acquired		19.60%		19.60%
KD Kona 2013 LLLP | Investment in land development partnerships
Investment Holdings [Line Items]
Ownership interest acquired	75.00%
KKM Makai LLLP | Investment in land development partnerships
Investment Holdings [Line Items]
Ownership interest acquired	34.45%
KD Kaupulehu LLLP Increment I | Investment in land development partnerships
Investment Holdings [Line Items]
Number of residential lots remaining to be sold | lot		9		9
KD Kaupulehu, LLLP | KD Acquisition II, LP | Investment in land development partnerships
Investment Holdings [Line Items]
Ownership interest acquired									55.00%
Kaupulehu Developments | KD Kaupulehu LLLP Increment II
Investment Holdings [Line Items]
Number of lots developed						2
Number of single family lots sold						1	1
Replay | KD Acquisition II, LP | Investment in land development partnerships
Investment Holdings [Line Items]
Ownership interest acquired									45.00%
Barnwell Industries Inc | KD Acquisition II, LP | Investment in land development partnerships
Investment Holdings [Line Items]
Ownership interest acquired		10.80%		10.80%
Non-controlling Interests | Investment in land development partnerships
Investment Holdings [Line Items]
Cash distribution from equity method investment				$ 599
Maximum | Kaupulehu Developments | KD Kaupulehu LLLP Increment II
Investment Holdings [Line Items]
Increment II lot size | a						3
Minimum | Investment in land development partnerships
Investment Holdings [Line Items]
Cumulative cash distributions from Kukio Resort Land Development Partnerships, threshold	$ 45,000
Minimum | Kaupulehu Developments | KD Kaupulehu LLLP Increment II
Investment Holdings [Line Items]
Increment II lot size | a						2