XML 69 R59.htm IDEA: XBRL DOCUMENT
v3.24.1.1.u2

RELATED PARTY TRANSACTIONS (Details) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Mar. 31, 2024 USD ($) | Mar. 31, 2023 USD ($) | Mar. 31, 2024 USD ($) lot | Mar. 31, 2023 USD ($) lot
Kaupulehu Developments |  |  |  |
Related party transactions |  |  |  |
Revenues - sale of interest in leasehold land | $ 500 | $ 0 | $ 500 | $ 265
Kaupulehu Developments | KD Kaupulehu, LLLP | Increment I |  |  |  |
Related party transactions |  |  |  |
Revenues - sale of interest in leasehold land |  |  | $ 500 | $ 265
Number of single family lots sold | lot |  |  | 2 | 1
KD Acquisition, LLLP |  |  |  |
Related party transactions |  |  |  |
Ownership interest acquired | 19.60% |  | 19.60% |
KD Acquisition II, LP | Barnwell Industries Inc |  |  |  |
Related party transactions |  |  |  |
Ownership interest acquired | 10.80% |  | 10.80% |

X
- Definition Represents the number of single-family lots sold. + References No definition available. + Details
Name: | brn_NumberOfSingleFamilyLotsSold
Namespace Prefix: | brn_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Revenue from the sale of interest in leasehold land. + References No definition available. + Details
Name: | brn_RevenuefromSaleofInterestinLeaseholdLand
Namespace Prefix: | brn_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 323 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (a)(1) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481687/323-10-50-3 + Details
Name: | us-gaap_EquityMethodInvestmentOwnershipPercentage
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 220 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.6-07(2)(c)(2)(i)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147483575/946-220-S99-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 220 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.6-07(2)(c)(2)(ii)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147483575/946-220-S99-1 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 220 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.6-07(2)(g)(3)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147483575/946-220-S99-1 + Details
Name: | us-gaap_RelatedPartyTransactionLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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

X
- Details
Name: | us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=brn_KDKaupulehuLLLPMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | brn_IncrementAxis=brn_IncrementIMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis=brn_KDAcquisitionLLLPMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis=brn_KDAcquisitionIILPMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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