XML 59 R48.htm IDEA: XBRL DOCUMENT
v3.21.1

OIL AND NATURAL GAS PROPERTIES (Details) - USD ($) | 3 Months Ended | 6 Months Ended
--- | --- | ---
Mar. 31, 2021 | Mar. 31, 2020 | Dec. 31, 2019 | Mar. 31, 2021 | Mar. 31, 2020
Oil and Natural Gas Properties [Line Items] |  |  |  |  |
Proceeds from sale of oil and natural gas assets |  |  |  | $ 0 | $ 594,000
Impairment of assets | $ 0 | $ 1,637,000 |  | $ 630,000 | $ 1,637,000
Barnwell Industries Inc | Progress |  |  |  |  |
Oil and Natural Gas Properties [Line Items] |  |  |  |  |
Proceeds from sale of oil and natural gas assets |  |  | $ 594,000 |  |

X
- References No definition available. + Details
Name: | brn_OilAndNaturalGasPropertiesLineItems
Namespace Prefix: | brn_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition 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. + References 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 + Details
Name: | us-gaap_AssetImpairmentCharges
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- 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=121586364&loc=d3e3179-108585 + Details
Name: | us-gaap_ProceedsFromSaleOfOilAndGasPropertyAndEquipment
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | dei_LegalEntityAxis=brn_BarnwellIndustriesIncMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementGeographicalAxis=brn_ProgressAlbertaCanadaMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |