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RELATED PARTY TRANSACTIONS (Details)
$ in Thousands
12 Months Ended 24 Months Ended
Sep. 30, 2018
USD ($)
lot
Sep. 30, 2017
USD ($)
lot
Sep. 30, 2016
lot
Sep. 30, 2018
USD ($)
Related party transactions        
Gross overriding royalty arrangement, percent 1.00%      
Accrued royalties $ 53     $ 53
Kaupulehu Developments        
Related party transactions        
Proceeds received from percentage of sales payments 1,645 $ 4,503    
Kaupulehu Developments | KD Kaupulehu, LLLP | Investment in land development partnerships        
Related party transactions        
Proceeds received from percentage of sales payments $ 645 $ 2,003    
Increment I | Phase II | Kaupulehu Developments | KD Kaupulehu, LLLP | Investment in land development partnerships        
Related party transactions        
Number of lots sold | lot 3 2    
Increment II | Kaupulehu Developments | KD Kaupulehu, LLLP | Investment in land development partnerships        
Related party transactions        
Number of lots sold | lot   1    
KD Kaupulehu LLLP Increment II | Kaupulehu Developments        
Related party transactions        
50% of Increment II distributions received $ 1,000 $ 2,500   3,500
Percent of Increment II distributions 50.00% 50.00%    
Contingent payments, unrecorded $ 8,000     $ 8,000
Number of lots sold | lot   1 1