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INFORMATION RELATING TO THE CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Details) (USD $) | 3 Months Ended
--- | ---
Dec. 31, 2014 | Dec. 31, 2013
Supplemental disclosure of cash flow information: |  |
Interest | $ 86,000 us-gaap_InterestPaid | $ 138,000 us-gaap_InterestPaid
Income taxes paid (refunded) |  | (78,000)us-gaap_IncomeTaxesPaidNet
Supplemental disclosure of non-cash investing and financing activities: |  |
Note receivable for proceeds on sale of investment | 907,000 us-gaap_NotesIssued1 |
Payable to affiliate for investment in land development partnerships |  | 1,000,000 brn_InvestmentInLandDevelopmentPartnerships
Oil and natural gas |  |
Supplemental disclosures of cash flow information: |  |
Increase (Decrease) in capital expenditure accruals related to oil and natural gas exploration and development | 106,000 brn_IncreaseDecreaseInOilAndNaturalGasExplorationAndDevelopmentAccruals / us-gaap_StatementBusinessSegmentsAxis = brn_OilAndNaturalGasMember | 82,000 brn_IncreaseDecreaseInOilAndNaturalGasExplorationAndDevelopmentAccruals / us-gaap_StatementBusinessSegmentsAxis = brn_OilAndNaturalGasMember
Increase (Decrease) in capital expenditure accruals related to oil and natural gas asset retirement obligations | $ (76,000)us-gaap_IncreaseDecreaseInAssetRetirementObligations / us-gaap_StatementBusinessSegmentsAxis = brn_OilAndNaturalGasMember | $ 57,000 us-gaap_IncreaseDecreaseInAssetRetirementObligations / us-gaap_StatementBusinessSegmentsAxis = brn_OilAndNaturalGasMember

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- Definition The increase (decrease) during the reporting period in the capital expenditure accruals related to oil and natural gas exploration and development. + References No definition available. + Details
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- Definition The amount of investments in land development partnerships in noncash transactions. + References No definition available. + Details
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- Definition The amount of cash paid during the current period to foreign, federal, state, and local authorities as taxes on income, net of any cash received during the current period as refunds for the overpayment of taxes. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4297-108586 + Details
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- Definition The increase (decrease) during the reporting period in the carrying amount of asset retirement obligations. + 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 (a) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 + Details
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- Definition The fair value of notes issued in noncash investing and financing activities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4332-108586 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4313-108586 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4304-108586 + Details
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