INVESTMENTS - INVESTMENT IN KUKIO RESORT LAND DEVELOPMENT PARTNERSHIP (Details) $ in Thousands		12 Months Ended
	Nov. 27, 2013 USD ($) partnership	Sep. 30, 2021 USD ($)	Sep. 30, 2020 USD ($)	Sep. 30, 2017 a lot	Sep. 30, 2016 lot	Mar. 07, 2019
Investment Holdings [Line Items]
Equity in income of affiliates		$ 5,793	$ 352
Investment in Kukio Resort Land Development Partnerships		0	901
Investments 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	197
Cumulative cash distributions from Kukio Resort land development Partnerships, preferred return		656
Cash distribution from equity method investment		6,011	360
Equity in income of affiliates		5,793	352
Basis difference between the carrying amount and underlying equity		138
Basis difference adjustment		146	13
Investment in Kukio Resort Land Development Partnerships			901
Cumulative Cash Distributions from Kukio Resort Land Development Partnerships In Excess Of Our Investment Balance Recorded As Income		$ 654
KD Kukio Resorts LLLP | Investments in land development partnerships
Investment Holdings [Line Items]
Ownership interest acquired	19.60%
KD Kaupulehu, LLLP | Investments in land development partnerships
Investment Holdings [Line Items]
Ownership interest acquired	19.60%
KD Maniniowali, LLLP | Investments in land development partnerships
Investment Holdings [Line Items]
Ownership interest acquired	19.60%
Indirectly Acquired Interest | Investments in land development partnerships
Investment Holdings [Line Items]
Aggregate cost	$ 5,140
KD Acquisition, LLLP | Investments in land development partnerships
Investment Holdings [Line Items]
Ownership interest acquired		19.60%
KD Kona 2013 LLLP | Investments in land development partnerships
Investment Holdings [Line Items]
Ownership interest acquired	75.00%
KKM Makai LLLP | Investments in land development partnerships
Investment Holdings [Line Items]
Ownership interest acquired	34.45%
KD Kaupulehu, LLLP | KD Acquisition II, LP | Investments 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 | a				2
Number of single family lots sold | lot				1	1
Replay | KD Acquisition II, LP | Investments in land development partnerships
Investment Holdings [Line Items]
Ownership interest acquired						45.00%
Barnwell Industries Inc | KD Acquisition II, LP | Investments in land development partnerships
Investment Holdings [Line Items]
Ownership interest acquired		10.80%
Non-controlling Interests | Investments in land development partnerships
Investment Holdings [Line Items]
Cash distribution from equity method investment		$ 683	$ 20
Minimum | Investments 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
Maximum | Kaupulehu Developments | KD Kaupulehu LLLP Increment II
Investment Holdings [Line Items]
Increment II lot size | a				3