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OIL AND NATURAL GAS PROPERTIES (Details) - USD ($) | 3 Months Ended | 9 Months Ended
--- | --- | ---
Jun. 30, 2020 | Dec. 31, 2019 | Jun. 30, 2019 | Dec. 31, 2018 | Jun. 30, 2020 | Jun. 30, 2019
Oil and Natural Gas Properties [Line Items] |  |  |  |  |  |
Proceeds from sale of oil and natural gas assets |  |  |  |  | $ 608,000 | $ 1,519,000
Impairment of assets | $ 2,689,000 |  | $ 0 |  | $ 4,326,000 | $ 2,413,000
Future capital expenditure, development of proved undeveloped reserves, over next five years |  | $ 12,000,000 |  |  |  |
Wood River and Twining |  |  |  |  |  |
Oil and Natural Gas Properties [Line Items] |  |  |  |  |  |
Acquisition costs |  |  |  | $ 355,000 |  |
Barnwell Industries Inc | Progress |  |  |  |  |  |
Oil and Natural Gas Properties [Line Items] |  |  |  |  |  |
Proceeds from sale of oil and natural gas assets |  | $ 594,000 |  |  |  |

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- Definition The cash inflow to dispose of long-lived, physical assets and mineral interests in oil and gas properties used for normal oil and gas operations. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3179-108585 + Details
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