RELATED PARTY TRANSACTIONS (Details) $ in Thousands	3 Months Ended
	Dec. 31, 2020 USD ($) lot	Dec. 31, 2019 USD ($)
Kaupulehu Developments
Related party transactions
Revenues - sale of interest in leasehold land	$ 485	$ 0
Kaupulehu Developments | KD Kaupulehu, LLLP | Investment in land development partnerships | Increment I
Related party transactions
Revenues - sale of interest in leasehold land	$ 485
Number of single family lots sold | lot	2
KD Acquisition, LLLP | Investment in land development partnerships
Related party transactions
Ownership interest acquired	19.60%
KD Acquisition II, LP | Barnwell Industries Inc | Investment in land development partnerships
Related party transactions
Ownership interest acquired	10.80%