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SUBSEQUENT EVENTS (Details) - USD ($)
$ in Thousands
1 Months Ended 12 Months Ended
Oct. 31, 2018
Sep. 30, 2018
Sep. 30, 2017
Nov. 27, 2013
Investment in land development partnerships        
Subsequent Event [Line Items]        
Cash distribution from equity method investment, net   $ 735 $ 3,223  
Minority interests portion of distribution from equity investee   89 396  
Kaupulehu Developments        
Subsequent Event [Line Items]        
Sale of interest in leasehold land   $ 1,645 $ 4,503  
Subsequent Event | Investment in land development partnerships        
Subsequent Event [Line Items]        
Cash distribution from equity method investment, net $ 314      
Cumulative cash distributions from Kukio Resort land development partnerships, made to date 45,000      
Subsequent Event | Investment in land development partnerships | Non-controlling Interests        
Subsequent Event [Line Items]        
Minority interests portion of distribution from equity investee 38      
Subsequent Event | Kaupulehu Developments        
Subsequent Event [Line Items]        
Sale of interest in leasehold land $ 165      
KKM Makai LLLP | Investment in land development partnerships        
Subsequent Event [Line Items]        
Equity method investment, ownership Percentage       34.45%
KKM Makai LLLP | Subsequent Event | Barnwell Hawaiian Properties, Inc.        
Subsequent Event [Line Items]        
Preferred return to be received as percentage from KKM 100.00%      
Maximum | KKM Makai LLLP | Subsequent Event | Barnwell Hawaiian Properties, Inc.        
Subsequent Event [Line Items]        
Preferred return, amount, from KKM $ 1,000      
Minimum | Subsequent Event | Investment in land development partnerships        
Subsequent Event [Line Items]        
Cumulative cash distributions from Kukio Resort Land Development Partnerships, threshold $ 45,000