XML 33 R52.htm IDEA: XBRL DOCUMENT
v2.4.1.9

INVESTMENTS (Details) (USD $) | 12 Months Ended | 0 Months Ended | 10 Months Ended | 0 Months Ended
--- | --- | --- | --- | ---
Sep. 30, 2014 | Sep. 30, 2013 | Nov. 27, 2013 item | Sep. 30, 2014 | Jul. 25, 2014
Summary of investments |  |  |  |  |
Total investments | $ 5,900,000 us-gaap_LongTermInvestments | $ 2,381,000 us-gaap_LongTermInvestments |  | $ 5,900,000 us-gaap_LongTermInvestments |
Equity in loss of affiliates | (482,000)us-gaap_IncomeLossFromEquityMethodInvestments |  |  |  |
Revenues sale of interest in leasehold land, net | 636,000 brn_SaleOfInterestInLeaseholdLandNet | 282,000 brn_SaleOfInterestInLeaseholdLandNet |  |  |
Additional payment to be received | 102,000 brn_AdditionalPaymentToBeReceivedFromSaleOfOtherInvestmentInterest |  |  | 102,000 brn_AdditionalPaymentToBeReceivedFromSaleOfOtherInvestmentInterest |
Gain on sale of investments | 3,399,000 us-gaap_GainOnSaleOfInvestments |  |  |  |
Gain on sale of investments relating to Non-Controlling Interest | 666,000 us-gaap_NetIncomeLossAttributableToNoncontrollingInterest | (109,000)us-gaap_NetIncomeLossAttributableToNoncontrollingInterest |  |  |
Investment in land |  |  |  |  |
Summary of investments |  |  |  |  |
Total investments | 1,192,000 us-gaap_LongTermInvestments / us-gaap_InvestmentTypeAxis = brn_ResidentialParcelMember | 2,331,000 us-gaap_LongTermInvestments / us-gaap_InvestmentTypeAxis = brn_ResidentialParcelMember |  | 1,192,000 us-gaap_LongTermInvestments / us-gaap_InvestmentTypeAxis = brn_ResidentialParcelMember |
Number of residential parcels owned | 2 us-gaap_NumberOfRealEstateProperties / us-gaap_InvestmentTypeAxis = brn_ResidentialParcelMember |  |  | 2 us-gaap_NumberOfRealEstateProperties / us-gaap_InvestmentTypeAxis = brn_ResidentialParcelMember |
Number of residential parcels held for investment | 1 brn_NumberOfRealEstatePropertiesHeldForInvestment / us-gaap_InvestmentTypeAxis = brn_ResidentialParcelMember |  |  | 1 brn_NumberOfRealEstatePropertiesHeldForInvestment / us-gaap_InvestmentTypeAxis = brn_ResidentialParcelMember |
Investment in land development partnerships |  |  |  |  |
Summary of investments |  |  |  |  |
Total investments | 4,658,000 us-gaap_LongTermInvestments / us-gaap_InvestmentTypeAxis = brn_LandDevelopmentPartnershipsMember |  |  | 4,658,000 us-gaap_LongTermInvestments / us-gaap_InvestmentTypeAxis = brn_LandDevelopmentPartnershipsMember |
Number of limited liability limited partnerships formed |  |  | 2 brn_NumberOfLimitedLiabilityLimitedPartnershipsFormed / us-gaap_InvestmentTypeAxis = brn_LandDevelopmentPartnershipsMember |  |
Equity in loss of affiliates |  |  |  | (482,000)us-gaap_IncomeLossFromEquityMethodInvestments / us-gaap_InvestmentTypeAxis = brn_LandDevelopmentPartnershipsMember |
Basis difference between the underlying equity in net assets of the investee and the carrying value of the entity's investment | 324,000 us-gaap_EquityMethodInvestmentDifferenceBetweenCarryingAmountAndUnderlyingEquity / us-gaap_InvestmentTypeAxis = brn_LandDevelopmentPartnershipsMember |  |  | 324,000 us-gaap_EquityMethodInvestmentDifferenceBetweenCarryingAmountAndUnderlyingEquity / us-gaap_InvestmentTypeAxis = brn_LandDevelopmentPartnershipsMember |
Bonds issued by the surety | 5,400,000 us-gaap_GuaranteeObligationsMaximumExposure / us-gaap_InvestmentTypeAxis = brn_LandDevelopmentPartnershipsMember |  |  | 5,400,000 us-gaap_GuaranteeObligationsMaximumExposure / us-gaap_InvestmentTypeAxis = brn_LandDevelopmentPartnershipsMember |
Maximum loss exposure | 10,058,000 us-gaap_VariableInterestEntityEntityMaximumLossExposureAmount / us-gaap_InvestmentTypeAxis = brn_LandDevelopmentPartnershipsMember |  |  | 10,058,000 us-gaap_VariableInterestEntityEntityMaximumLossExposureAmount / us-gaap_InvestmentTypeAxis = brn_LandDevelopmentPartnershipsMember |
Summarized financial information |  |  |  |  |
Revenue |  |  |  | 5,114,000 us-gaap_EquityMethodInvestmentSummarizedFinancialInformationRevenue / us-gaap_InvestmentTypeAxis = brn_LandDevelopmentPartnershipsMember |
Gross profit |  |  |  | 2,058,000 us-gaap_EquityMethodInvestmentSummarizedFinancialInformationGrossProfitLoss / us-gaap_InvestmentTypeAxis = brn_LandDevelopmentPartnershipsMember |
Net loss |  |  |  | (1,614,000)us-gaap_EquityMethodInvestmentSummarizedFinancialInformationNetIncomeLoss / us-gaap_InvestmentTypeAxis = brn_LandDevelopmentPartnershipsMember |
Investment in land development partnerships | KD Kukio Resorts, LLLP, KD Maniniowali, LLLP, and KD Kaupulehu, LLLP |  |  |  |  |
Summary of investments |  |  |  |  |
Ownership interest acquired, aggregate cost |  |  | 5,140,000 us-gaap_EquityMethodInvestmentAggregateCost / us-gaap_InvestmentTypeAxis = brn_LandDevelopmentPartnershipsMember / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = brn_IndirectlyAcquiredInterestMember |  |
Investment in land development partnerships | KD Kukio Resorts, LLLP |  |  |  |  |
Summary of investments |  |  |  |  |
Ownership interest acquired (as a percent) |  |  | 19.60%us-gaap_EquityMethodInvestmentOwnershipPercentage / us-gaap_InvestmentTypeAxis = brn_LandDevelopmentPartnershipsMember / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = brn_KDKukioResortsLLLPMember |  |
Investment in land development partnerships | KD Maniniowali, LLLP |  |  |  |  |
Summary of investments |  |  |  |  |
Ownership interest acquired (as a percent) |  |  | 19.60%us-gaap_EquityMethodInvestmentOwnershipPercentage / us-gaap_InvestmentTypeAxis = brn_LandDevelopmentPartnershipsMember / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = brn_KDManiniowaliLLLPMember |  |
Investment in land development partnerships | KD Kaupulehu, LLLP |  |  |  |  |
Summary of investments |  |  |  |  |
Ownership interest acquired (as a percent) |  |  | 19.60%us-gaap_EquityMethodInvestmentOwnershipPercentage / us-gaap_InvestmentTypeAxis = brn_LandDevelopmentPartnershipsMember / us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis = brn_KDKaupulehuLLLPMember |  |
Investment in leasehold land interest - Lot 4C |  |  |  |  |
Summary of investments |  |  |  |  |
Total investments | 50,000 us-gaap_LongTermInvestments / us-gaap_InvestmentTypeAxis = brn_LandInterestMember | 50,000 us-gaap_LongTermInvestments / us-gaap_InvestmentTypeAxis = brn_LandInterestMember |  | 50,000 us-gaap_LongTermInvestments / us-gaap_InvestmentTypeAxis = brn_LandInterestMember |
Area of land (in acres) | 1,000 us-gaap_AreaOfLand / us-gaap_InvestmentTypeAxis = brn_LandInterestMember |  |  | 1,000 us-gaap_AreaOfLand / us-gaap_InvestmentTypeAxis = brn_LandInterestMember |
Kaupulehu Developments |  |  |  |  |
Summary of investments |  |  |  |  |
Area of land (in acres) | 870 us-gaap_AreaOfLand / dei_LegalEntityAxis = brn_KaupulehuDevelopmentsMember |  |  | 870 us-gaap_AreaOfLand / dei_LegalEntityAxis = brn_KaupulehuDevelopmentsMember |
Number of development increments | 2 brn_NumberOfDevelopmentIncrements / dei_LegalEntityAxis = brn_KaupulehuDevelopmentsMember |  |  |  |
Sale of interest in leasehold land: Proceeds | 740,000 brn_ProceedsFromSaleOfInterestInLeaseholdLandGross / dei_LegalEntityAxis = brn_KaupulehuDevelopmentsMember | 300,000 brn_ProceedsFromSaleOfInterestInLeaseholdLandGross / dei_LegalEntityAxis = brn_KaupulehuDevelopmentsMember |  |  |
Sale of interest in leasehold land: Fees | (104,000)brn_FeesRelatedToSaleOfInterestInLeaseholdLand / dei_LegalEntityAxis = brn_KaupulehuDevelopmentsMember | (18,000)brn_FeesRelatedToSaleOfInterestInLeaseholdLand / dei_LegalEntityAxis = brn_KaupulehuDevelopmentsMember |  |  |
Revenues sale of interest in leasehold land, net | 636,000 brn_SaleOfInterestInLeaseholdLandNet / dei_LegalEntityAxis = brn_KaupulehuDevelopmentsMember | 282,000 brn_SaleOfInterestInLeaseholdLandNet / dei_LegalEntityAxis = brn_KaupulehuDevelopmentsMember |  |  |
Ownership interest in subsidiaries (as a percent) | 77.60%us-gaap_SubsidiaryOrEquityMethodInvesteeCumulativePercentageOwnershipAfterAllTransactions / dei_LegalEntityAxis = brn_KaupulehuDevelopmentsMember |  |  |  |
Number of single-family lots planned in Increment I | 80 brn_NumberOfSingleFamilyLotsPlannedInIncrementI / dei_LegalEntityAxis = brn_KaupulehuDevelopmentsMember |  |  |  |
Kaupulehu Developments | Phase I |  |  |  |  |
Summary of investments |  |  |  |  |
Number of lots sold in Increment I | 32 brn_NumberOfSingleFamilyLotsSold / dei_LegalEntityAxis = brn_KaupulehuDevelopmentsMember / brn_PhaseAxis = brn_PhaseOneMember |  |  |  |
Number of single-family lots planned in Increment I | 38 brn_NumberOfSingleFamilyLotsPlannedInIncrementI / dei_LegalEntityAxis = brn_KaupulehuDevelopmentsMember / brn_PhaseAxis = brn_PhaseOneMember |  |  |  |
Kaupulehu Developments | Phase II |  |  |  |  |
Summary of investments |  |  |  |  |
Number of lots sold in Increment I | 3 brn_NumberOfSingleFamilyLotsSold / dei_LegalEntityAxis = brn_KaupulehuDevelopmentsMember / brn_PhaseAxis = brn_PhaseTwoMember |  |  |  |
Number of single-family lots planned in Increment I | 42 brn_NumberOfSingleFamilyLotsPlannedInIncrementI / dei_LegalEntityAxis = brn_KaupulehuDevelopmentsMember / brn_PhaseAxis = brn_PhaseTwoMember |  |  |  |
Kaupulehu Developments | Aggregate gross proceeds up to $100,000,000 |  |  |  |  |
Summary of investments |  |  |  |  |
Payments entitled to be received from KD I as percentage of gross receipts from KD I's sales of single-family residential lots in Increment I | 9.00%brn_PaymentsEntitledToBeReceivedAsPercentageOfGrossProceedsFromSaleOfSingleFamilyLotsInIncrementI / brn_AggregateGrossProceedsFromSaleOfResidentialLotsRangeAxis = brn_AggregateGrossProceedsRangeOneMember / dei_LegalEntityAxis = brn_KaupulehuDevelopmentsMember |  |  |  |
Kaupulehu Developments | Aggregate gross proceeds greater than $100,000,000 up to $300,000,000 |  |  |  |  |
Summary of investments |  |  |  |  |
Payments entitled to be received from KD I as percentage of gross receipts from KD I's sales of single-family residential lots in Increment I | 10.00%brn_PaymentsEntitledToBeReceivedAsPercentageOfGrossProceedsFromSaleOfSingleFamilyLotsInIncrementI / brn_AggregateGrossProceedsFromSaleOfResidentialLotsRangeAxis = brn_AggregateGrossProceedsRangeTwoMember / dei_LegalEntityAxis = brn_KaupulehuDevelopmentsMember |  |  |  |
Kaupulehu Developments | Aggregate gross proceeds in excess of $300,000,000 |  |  |  |  |
Summary of investments |  |  |  |  |
Payments entitled to be received from KD I as percentage of gross receipts from KD I's sales of single-family residential lots in Increment I | 14.00%brn_PaymentsEntitledToBeReceivedAsPercentageOfGrossProceedsFromSaleOfSingleFamilyLotsInIncrementI / brn_AggregateGrossProceedsFromSaleOfResidentialLotsRangeAxis = brn_AggregateGrossProceedsRangeThreeMember / dei_LegalEntityAxis = brn_KaupulehuDevelopmentsMember |  |  |  |
Kaupulehu Developments | Minimum | Aggregate gross proceeds greater than $100,000,000 up to $300,000,000 |  |  |  |  |
Summary of investments |  |  |  |  |
Gross proceeds from sale of Increment I single-family lots on which payments to be received from KD I is based | 100,000,000 brn_AggregateGrossProceedsFromSaleOfIncrementISingleFamilyLotsForCalculatingPaymentsEntitledToBeReceived / brn_AggregateGrossProceedsFromSaleOfResidentialLotsRangeAxis = brn_AggregateGrossProceedsRangeTwoMember / dei_LegalEntityAxis = brn_KaupulehuDevelopmentsMember / us-gaap_RangeAxis = us-gaap_MinimumMember |  |  |  |
Kaupulehu Developments | Minimum | Aggregate gross proceeds in excess of $300,000,000 |  |  |  |  |
Summary of investments |  |  |  |  |
Gross proceeds from sale of Increment I single-family lots on which payments to be received from KD I is based | 300,000,000 brn_AggregateGrossProceedsFromSaleOfIncrementISingleFamilyLotsForCalculatingPaymentsEntitledToBeReceived / brn_AggregateGrossProceedsFromSaleOfResidentialLotsRangeAxis = brn_AggregateGrossProceedsRangeThreeMember / dei_LegalEntityAxis = brn_KaupulehuDevelopmentsMember / us-gaap_RangeAxis = us-gaap_MinimumMember |  |  |  |
Kaupulehu Developments | Maximum | Aggregate gross proceeds up to $100,000,000 |  |  |  |  |
Summary of investments |  |  |  |  |
Gross proceeds from sale of Increment I single-family lots on which payments to be received from KD I is based | 100,000,000 brn_AggregateGrossProceedsFromSaleOfIncrementISingleFamilyLotsForCalculatingPaymentsEntitledToBeReceived / brn_AggregateGrossProceedsFromSaleOfResidentialLotsRangeAxis = brn_AggregateGrossProceedsRangeOneMember / dei_LegalEntityAxis = brn_KaupulehuDevelopmentsMember / us-gaap_RangeAxis = us-gaap_MaximumMember |  |  |  |
Kaupulehu Developments | Maximum | Aggregate gross proceeds greater than $100,000,000 up to $300,000,000 |  |  |  |  |
Summary of investments |  |  |  |  |
Gross proceeds from sale of Increment I single-family lots on which payments to be received from KD I is based | 300,000,000 brn_AggregateGrossProceedsFromSaleOfIncrementISingleFamilyLotsForCalculatingPaymentsEntitledToBeReceived / brn_AggregateGrossProceedsFromSaleOfResidentialLotsRangeAxis = brn_AggregateGrossProceedsRangeTwoMember / dei_LegalEntityAxis = brn_KaupulehuDevelopmentsMember / us-gaap_RangeAxis = us-gaap_MaximumMember |  |  |  |
Kaupulehu Investors, LLC |  |  |  |  |
Summary of investments |  |  |  |  |
Ownership interest in subsidiaries (as a percent) | 80.00%us-gaap_SubsidiaryOrEquityMethodInvesteeCumulativePercentageOwnershipAfterAllTransactions / dei_LegalEntityAxis = brn_KaupulehuInvestorsLLCMember |  |  |  |
Kaupulehu Investors, LLC | Haulalai Resort and Kona Village Resort |  |  |  |  |
Summary of investments |  |  |  |  |
Total investments |  |  |  |  | 0 us-gaap_LongTermInvestments / dei_LegalEntityAxis = brn_KaupulehuInvestorsLLCMember / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = brn_HaulalaiResortAndKonaVillageResortMember
Ownership interest in subsidiaries (as a percent) |  |  |  |  | 80.00%us-gaap_SubsidiaryOrEquityMethodInvesteeCumulativePercentageOwnershipAfterAllTransactions / dei_LegalEntityAxis = brn_KaupulehuInvestorsLLCMember / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = brn_HaulalaiResortAndKonaVillageResortMember
Cash proceeds received |  |  |  |  | 3,297,000 us-gaap_ProceedsFromSaleOfOtherInvestments / dei_LegalEntityAxis = brn_KaupulehuInvestorsLLCMember / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = brn_HaulalaiResortAndKonaVillageResortMember
Gain on sale of investments |  |  |  |  | 3,399,000 us-gaap_GainOnSaleOfInvestments / dei_LegalEntityAxis = brn_KaupulehuInvestorsLLCMember / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = brn_HaulalaiResortAndKonaVillageResortMember
Gain on sale of investments relating to Non-Controlling Interest |  |  |  |  | 679,000 us-gaap_NetIncomeLossAttributableToNoncontrollingInterest / dei_LegalEntityAxis = brn_KaupulehuInvestorsLLCMember / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = brn_HaulalaiResortAndKonaVillageResortMember
Capital and operating cash call investments |  |  |  |  | 3,193,000 us-gaap_PaymentsForProceedsFromInvestments / dei_LegalEntityAxis = brn_KaupulehuInvestorsLLCMember / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = brn_HaulalaiResortAndKonaVillageResortMember
Kaupulehu Investors, LLC | Haulalai Resort |  |  |  |  |
Summary of investments |  |  |  |  |
Passive minority interests in various joint ventures (as a percent) |  |  |  |  | 1.50%brn_CostMethodInvestmentOwnershipPercentage / dei_LegalEntityAxis = brn_KaupulehuInvestorsLLCMember / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = brn_HaulalaiResortMember
Kaupulehu Investors, LLC | Kona Village Resort |  |  |  |  |
Summary of investments |  |  |  |  |
Passive minority interests in various joint ventures (as a percent) |  |  |  |  | 1.50%brn_CostMethodInvestmentOwnershipPercentage / dei_LegalEntityAxis = brn_KaupulehuInvestorsLLCMember / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = brn_KonaVillageResortMember
Kaupulehu Investors, LLC | Sale of an interest in a related utility |  |  |  |  |
Summary of investments |  |  |  |  |
Additional payment to be received |  |  |  |  | $ 102,000 brn_AdditionalPaymentToBeReceivedFromSaleOfOtherInvestmentInterest / dei_LegalEntityAxis = brn_KaupulehuInvestorsLLCMember / us-gaap_SignificantAcquisitionsAndDisposalsByTransactionAxis = brn_SaleOfInterestInRelatedUtilityMember

X
- Definition Represents the additional payment to be received by the entity pending the sale of other investment interest. + References No definition available. + Details
Name: | brn_AdditionalPaymentToBeReceivedFromSaleOfOtherInvestmentInterest
Namespace Prefix: | brn_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Represents aggregate proceeds from the sale of Increment I single-family lots on which payment to be received is based. + References No definition available. + Details
Name: | brn_AggregateGrossProceedsFromSaleOfIncrementISingleFamilyLotsForCalculatingPaymentsEntitledToBeReceived
Namespace Prefix: | brn_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Represents the percentage of ownership of common stock or equity participation in the investee accounted for under the cost method of accounting. + References No definition available. + Details
Name: | brn_CostMethodInvestmentOwnershipPercentage
Namespace Prefix: | brn_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the fees related to sale of interest in leasehold land. + References No definition available. + Details
Name: | brn_FeesRelatedToSaleOfInterestInLeaseholdLand
Namespace Prefix: | brn_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Represents the number of development increments from which lots and/or residential units will be sold. + References No definition available. + Details
Name: | brn_NumberOfDevelopmentIncrements
Namespace Prefix: | brn_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the number of limited liability limited partnerships formed through a wholly-owed subsidiary. + References No definition available. + Details
Name: | brn_NumberOfLimitedLiabilityLimitedPartnershipsFormed
Namespace Prefix: | brn_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition The number of real estate properties owned and held for investment as of the balance sheet date. + References No definition available. + Details
Name: | brn_NumberOfRealEstatePropertiesHeldForInvestment
Namespace Prefix: | brn_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

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

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

X
- Definition Represents the percentage of gross proceeds to be received from the sale of single-family residential lots in Increment I. + References No definition available. + Details
Name: | brn_PaymentsEntitledToBeReceivedAsPercentageOfGrossProceedsFromSaleOfSingleFamilyLotsInIncrementI
Namespace Prefix: | brn_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

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

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

X
- Definition Area of land held. + References No definition available. + Details
Name: | us-gaap_AreaOfLand
Namespace Prefix: | us-gaap_
Data Type: | num:areaItemType
Balance Type: | na
Period Type: | instant

X
- Definition This element represents the aggregate cost of investments accounted for under the equity method of accounting. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.12) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 12 -Article 5 + Details
Name: | us-gaap_EquityMethodInvestmentAggregateCost
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Difference between amount at which an investment accounted for under the equity method of accounting is carried (reported) on the balance sheet and amount of underlying equity in net assets the reporting Entity has in the investee. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=6382943&loc=d3e33918-111571 + Details
Name: | us-gaap_EquityMethodInvestmentDifferenceBetweenCarryingAmountAndUnderlyingEquity
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=6382943&loc=d3e33918-111571 + Details
Name: | us-gaap_EquityMethodInvestmentOwnershipPercentage
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition The amount of gross profit (loss) reported by an equity method investment of the entity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(g)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6382943&loc=d3e33918-111571 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6382943&loc=d3e33912-111571 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 28 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=6957238&loc=d3e14064-108612 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph bb -Article 1 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph g -Subparagraph 1, 2 -Article 4 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph w -Article 1 + Details
Name: | us-gaap_EquityMethodInvestmentSummarizedFinancialInformationGrossProfitLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | us-gaap_EquityMethodInvestmentSummarizedFinancialInformationIncomeStatementAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The amount of net income (loss) reported by an equity method investment of the entity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(g)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6382943&loc=d3e33918-111571 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6382943&loc=d3e33912-111571 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 28 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=6957238&loc=d3e14064-108612 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph bb -Article 1 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph g -Subparagraph 1, 2 -Article 4 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph w -Article 1 + Details
Name: | us-gaap_EquityMethodInvestmentSummarizedFinancialInformationNetIncomeLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The amount of revenue from sale of goods and services reduced by sales returns, allowances, and discounts reported by an equity method investment of the entity. + References No definition available. + Details
Name: | us-gaap_EquityMethodInvestmentSummarizedFinancialInformationRevenue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The difference between the carrying value and the sale price of an investment. A gain would be recognized when the sale price of the investment is greater than the carrying value of the investment. This element refers to the Gain included in earnings and not to the cash proceeds of the sale. + References No definition available. + Details
Name: | us-gaap_GainOnSaleOfInvestments
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Maximum potential amount of future payments (undiscounted) the guarantor could be required to make under the guarantee or each group of similar guarantees before reduction for potential recoveries under recourse or collateralization provisions. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=6851643&loc=d3e12069-110248 + Details
Name: | us-gaap_GuaranteeObligationsMaximumExposure
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition This item represents the entity's proportionate share for the period of the net income (loss) of its investee (such as unconsolidated subsidiaries and joint ventures) to which the equity method of accounting is applied. This item includes income or expense related to stock-based compensation based on the investor's grant of stock to employees of an equity method investee. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 9 -Article 5 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=35755396&loc=d3e33749-111570 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.12) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 11 -Article 7 + Details
Name: | us-gaap_IncomeLossFromEquityMethodInvestments
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | us-gaap_InvestmentHoldingsLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The total amount of investments that are intended to be held for an extended period of time (longer than one operating cycle). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.12) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_LongTermInvestments
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of Net Income (Loss) attributable to noncontrolling interest. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 50 -Paragraph 1A -URI http://asc.fasb.org/extlink&oid=18733093&loc=SL4573702-111684 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 55 -Paragraph 4J -URI http://asc.fasb.org/extlink&oid=35736750&loc=SL4591551-111686 + Details
Name: | us-gaap_NetIncomeLossAttributableToNoncontrollingInterest
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The number of real estate properties owned as of the balance sheet date. + References No definition available. + Details
Name: | us-gaap_NumberOfRealEstateProperties
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition The net cash paid (received) associated with the acquisition or disposal of all investments, including securities and other assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3095-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 9 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3098-108585 + Details
Name: | us-gaap_PaymentsForProceedsFromInvestments
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The cash inflow associated with the sale of other investments not otherwise defined in the taxonomy. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 24 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3521-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 26 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3574-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3179-108585 + Details
Name: | us-gaap_ProceedsFromSaleOfOtherInvestments
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Percentage of subsidiary's or equity method investee's stock owned by parent immediately after all stock transactions. + References No definition available. + Details
Name: | us-gaap_SubsidiaryOrEquityMethodInvesteeCumulativePercentageOwnershipAfterAllTransactions
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition The reporting entity's maximum amount of exposure to loss as a result of its involvement with the Variable Interest Entity (VIE). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph b -URI http://asc.fasb.org/extlink&oid=28200181&loc=d3e5728-111685 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 50 -Paragraph 6 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=28200181&loc=d3e5747-111685 + Details
Name: | us-gaap_VariableInterestEntityEntityMaximumLossExposureAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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

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

X
- Details
Name: | us-gaap_InvestmentTypeAxis=brn_LandDevelopmentPartnershipsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InvestmentTypeAxis=brn_LandInterestMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_InvestmentTypeAxis=brn_ResidentialParcelMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |