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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 |  |

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