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SUBSEQUENT EVENTS	9 Months Ended
SUBSEQUENT EVENTS	Jun. 30, 2020
Subsequent Events [Abstract]
SUBSEQUENT EVENTS	SUBSEQUENT EVENTS In early August 2020, Kaupulehu Developments received two percentage of sales payments totaling $325,000 from the sale of two lots within Phase II of Increment I. Financial results from the receipt of these payments will be reflected in Barnwell’s quarter and year ending September 30, 2020.