Represents the Percentage Of Debt Forgiveness

No definition available.

Name:	brn_PercentageOfDebtForgiveness
Namespace Prefix:	brn_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage Of Loan To Be Repaid For Debt Forgiveness

+ References

No definition available.

+ Details

Name:	brn_PercentageOfLoanToBeRepaidForDebtForgiveness
Namespace Prefix:	brn_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Decrease for amounts of indebtedness forgiven by the holder of the debt instrument.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08(f))
-URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690

+ Details

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

- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
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+ Details

Name:	us-gaap_DebtInstrumentFaceAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Net increase or decrease in the carrying amount of the debt instrument for the period.

+ References

+ Details

Name:	us-gaap_DebtInstrumentIncreaseDecreaseForPeriodNet
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

+ Details

Name:	us-gaap_DebtInstrumentInterestRateStatedPercentage
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- 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

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentTerm
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
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+ Details

Name:	us-gaap_GainsLossesOnExtinguishmentOfDebt
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Details

Name:	us-gaap_DebtInstrumentAxis=brn_CanadaEmergencyBusinessAccountLoanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=brn_PaycheckProtectionProgramLoanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

DEBT (Details) $ in Thousands, $ in Thousands		3 Months Ended			9 Months Ended
DEBT (Details) $ in Thousands, $ in Thousands	Apr. 28, 2020 USD ($)	Jun. 30, 2022 USD ($)	Jun. 30, 2021 USD ($)	Mar. 31, 2021 CAD ($)	Jun. 30, 2022 USD ($)	Jun. 30, 2022 CAD ($)	Jun. 30, 2021 USD ($)	Jun. 30, 2022 CAD ($)	Dec. 31, 2020 CAD ($)
Debt Instrument [Line Items]
Gain on debt extinguishment		$ 0	$ 149		$ 0		$ 149
Canada Emergency Business Account Loan
Debt Instrument [Line Items]
Debt face amount		$ 47			$ 47			$ 60	$ 40
Debt instrument, net increase				$ 20
Debt term					2 years	2 years
Interest rate		5.00%			5.00%			5.00%
Percentage of loan to be repaid for debt forgiveness					66.60%	66.60%
Percentage of debt forgiveness					33.30%	33.30%
Maximum amount of loan forgiveness						$ 20
Paycheck Protection Program Loan
Debt Instrument [Line Items]
Debt face amount	$ 147
Debt term	2 years
Interest rate	1.00%
Gain on debt extinguishment			$ 149				$ 149