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COMMITMENTS AND CONTINGENCIES	3 Months Ended
COMMITMENTS AND CONTINGENCIES	Dec. 31, 2016
Commitments and Contingencies Disclosure [Abstract]
COMMITMENTS AND CONTINGENCIES	COMMITMENTS AND CONTINGENCIES Environmental Matters In February 2016, a gas migration was detected at one of our previously abandoned non-operated wells in Alberta, Canada. We have estimated that probable environmental remediation costs will be within the range of $400,000 to $800,000. Barnwell’s working interest in the well is 50%, and accordingly we accrued approximately $200,000 at December 31, 2016 and September 30, 2016, which has not been discounted and was accrued in "Accrued operating and other expenses" on the Condensed Consolidated Balance Sheets, however as non-operator we have no control over the actual cost or timing of the eventual remediation. Because of the inherent uncertainties associated with environmental assessment and remediation activities, future expenses to remediate the currently identified site, and sites identified in the future, if any, could be incurred. Guarantee See Note 5 for a discussion of Barnwell’s guarantee of the Kukio Resort land development partnership’s performance bonds.