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RELATED PARTY TRANSACTIONS (Details)
$ in Thousands
1 Months Ended 5 Months Ended 12 Months Ended
Jun. 30, 2018
USD ($)
Mar. 06, 2019
USD ($)
Sep. 30, 2020
USD ($)
lot
Sep. 30, 2019
USD ($)
lot
Sep. 30, 2017
lot
Sep. 30, 2016
lot
Kaupulehu Developments            
Related party transactions            
Revenues - sale of interest in leasehold land     $ 325 $ 165    
Kaupulehu Developments | KD Kaupulehu LLLP Increment I | Investments in land development partnerships            
Related party transactions            
Revenues - sale of interest in leasehold land     $ 325 $ 165    
Kaupulehu Developments | KD Kaupulehu LLLP Increment II            
Related party transactions            
Percent of Increment II distributions   50.00%        
Gain contingency, unrecorded amount   $ 8,000        
50% of Increment II distributions received   $ 3,500        
Kaupulehu Developments | KD Kaupulehu, LLLP | Investments in land development partnerships | Increment I            
Related party transactions            
Number of single family lots sold | lot     2 1    
KD Kaupulehu LLLP Increment II | Kaupulehu Developments            
Related party transactions            
50% of Increment II distributions received $ 1,000          
Number of single family lots sold | lot         1 1
KD Acquisition, LLLP | Investments in land development partnerships            
Related party transactions            
Ownership interest acquired     19.60%      
KD Acquisition II, LP | Barnwell Industries Inc | Investments in land development partnerships            
Related party transactions            
Ownership interest acquired     10.80%