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DISCONTINUED OPERATIONS (Details) - USD ($)
12 Months Ended
Feb. 23, 2016
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2016
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]        
Gain on sale of partnership interest   $ 0 $ 0 $ 15,467,000
Discontinued operations | Newark Joint Venture        
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]        
Sales Price $ 16,900,000      
Gain on sale of partnership interest 15,467,000     $ 15,467,000
Liability arrangement, amount outstanding $ 2,800,000