OIL AND NATURAL GAS PROPERTIES (Details) - USD ($) $ in Thousands	3 Months Ended
Dec. 31, 2020	Dec. 31, 2019
Oil and Natural Gas Properties [Line Items]
Proceeds from sale of oil and natural gas assets	$ 0	$ 594
Impairment of assets	630	0
Oil and natural gas
Oil and Natural Gas Properties [Line Items]
Impairment of assets	$ 630	0
Barnwell Industries Inc \| Progress
Oil and Natural Gas Properties [Line Items]
Proceeds from sale of oil and natural gas assets		$ 594

Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3602-108585

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 45
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=109226348&loc=d3e2420-110228

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration