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SUBSEQUENT EVENTS (Details) - USD ($)
$ in Thousands
1 Months Ended 2 Months Ended 9 Months Ended
Aug. 13, 2021
Jun. 30, 2021
Jun. 30, 2021
Jun. 30, 2020
Jul. 08, 2021
Sep. 30, 2020
Subsequent Event [Line Items]            
Proceeds from the sale of oil and natural gas assets     $ 60 $ 608    
Income taxes receivable   $ 59 59     $ 472
At The Market Offering            
Subsequent Event [Line Items]            
Common shares sold (in shares)   586,546        
Proceeds from sale of common stock   $ 1,860        
Stock issuance costs, commission and fees   $ 59        
Investment in land development partnerships            
Subsequent Event [Line Items]            
Cash distribution from equity method investment     $ 5,328 $ 0    
Subsequent Event | At The Market Offering            
Subsequent Event [Line Items]            
Common shares sold (in shares) 581,441          
Proceeds from sale of common stock $ 1,924          
Stock issuance costs, commission and fees 64          
Subsequent Event | Barnwell Industries Inc | Spirit River, Alberta Canada            
Subsequent Event [Line Items]            
Proceeds from the sale of oil and natural gas assets 1,047          
Income taxes receivable         $ 524  
Subsequent Event | Investment in land development partnerships            
Subsequent Event [Line Items]            
Cash distribution from equity method investment $ 683