Disposal Group, Percentage Of Equity Interest Sold

No definition available.

Name:	brt_DisposalGroupPercentageOfEquityInterestSold
Namespace Prefix:	brt_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Mortgage Payable, Weighted Average Remaining Term To Maturity

+ References

No definition available.

+ Details

Name:	brt_MortgagePayableWeightedAverageRemainingTermToMaturity
Namespace Prefix:	brt_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Number Of Sales Of Properties

+ References

No definition available.

+ Details

Name:	brt_NumberOfSalesOfProperties
Namespace Prefix:	brt_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Real Estate Investment, Additional Interest Acquired

+ References

No definition available.

+ Details

Name:	brt_RealEstateInvestmentAdditionalInterestAcquired
Namespace Prefix:	brt_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Represents the contract purchase of the real estate investment property.

+ References

No definition available.

+ Details

Name:	brt_RealEstateInvestmentPropertyContractPurchasePrice
Namespace Prefix:	brt_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 1B
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=123466505&loc=SL123495323-112611

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(1))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

+ Details

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

- Definition

Weighted average interest rate of debt outstanding.

+ References

No definition available.

+ Details

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

- Definition

Amount of consideration received or receivable for the disposal of assets and liabilities, including discontinued operation.

+ References

No definition available.

+ Details

Name:	us-gaap_DisposalGroupIncludingDiscontinuedOperationConsideration
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The difference between the carrying value and the sale price of real estate or properties that were intended to be sold or held for capital appreciation or rental income. This element refers to the gain (loss) included in earnings and not to the cash proceeds of the sale. This element is a noncash adjustment to net income when calculating net cash generated by operating activities using the indirect method.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=109226691&loc=d3e2941-110230

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3602-108585

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 45
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=123351718&loc=d3e2443-110228

+ Details

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

- Definition

Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (b)(3)
-URI http://asc.fasb.org/extlink&oid=123466204&loc=SL6031897-161870

Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 55
-Paragraph 69C
-URI http://asc.fasb.org/extlink&oid=123466577&loc=SL123495737-112612

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(16))
-URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910

Reference 4: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 55
-Paragraph 69B
-URI http://asc.fasb.org/extlink&oid=123466577&loc=SL123495735-112612

Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(16))
-URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 1D
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=123466505&loc=SL123495340-112611

Reference 7: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(22))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

+ Details

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

- Definition

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

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (bbb)(2)
-URI http://asc.fasb.org/extlink&oid=123874694&loc=d3e19207-110258

+ Details

Name:	us-gaap_LongTermDebtTerm
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	instant

- 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

- Definition

The number of units in a real estate property owned as of the balance sheet date.

+ References

No definition available.

+ Details

Name:	us-gaap_NumberOfUnitsInRealEstateProperty
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
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_ScheduleOfEquityMethodInvestmentsLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis=brt_UnconsolidatedJointVenturesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_StatementGeographicalAxis=brt_SanAntonioTexasMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DisposalGroupClassificationAxis=us-gaap_DiscontinuedOperationsDisposedOfBySaleMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	dei_LegalEntityAxis=brt_UnconsolidatedJointVentureTheVerandasAtShavanoMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_StatementGeographicalAxis=brt_KannapolisNCMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_StatementGeographicalAxis=brt_StonoOaksJohnsIslandSCMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis=brt_DevelopmentPropertyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_ConsolidatedEntitiesAxis=us-gaap_VariableInterestEntityPrimaryBeneficiaryMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_StatementGeographicalAxis=brt_VerandasAtAlamoSanAntonioTXMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_TypeOfArrangementAxis=brt_PropertyAcquisitionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=us-gaap_MortgagesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis=srt_ApartmentBuildingMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_StatementGeographicalAxis=brt_VanguardHeightsCreveCoeurMOMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Investment in Unconsolidated Ventures - Narrative (Details)	1 Months Ended	3 Months Ended		12 Months Ended
	May 03, 2022 USD ($) sale multi-familyProperty	Mar. 31, 2022 USD ($) property property_unit	Mar. 31, 2021 USD ($)	Dec. 31, 2021 property	Apr. 16, 2022 USD ($) multi-familyProperty	Apr. 07, 2022 USD ($) multi-familyProperty	Mar. 23, 2022 USD ($) multi-familyProperty	Mar. 10, 2022 USD ($) property_unit	Feb. 08, 2022 USD ($) multi-familyProperty
Schedule of Equity Method Investments [Line Items]
Percentage of equity interest sold									65.00%
Number of units \| property_unit		2,864
Gain on sale of real estate		$ 6,000	$ 0
Subsequent Event
Schedule of Equity Method Investments [Line Items]
Percentage of equity interest sold					75.00%
Number of sales of properties \| sale	2
Unconsolidated Joint Ventures
Schedule of Equity Method Investments [Line Items]
Number of properties \| property		21		23
Weighted average interest rate percentage		4.07%		3.97%
Weighted average remaining term to maturity		7 years 7 months 20 days		7 years 7 months 6 days
Gain on sale of real estate		$ 23,652,000	$ 0
Unconsolidated Joint Ventures \| San Antonio, Texas
Schedule of Equity Method Investments [Line Items]
Mortgage debt outstanding									$ 25,100,000
Long-term debt term									1 year 2 months 12 days
Interest rate									3.61%
Unconsolidated Joint Ventures \| San Antonio, Texas \| Property dispositions
Schedule of Equity Method Investments [Line Items]
Number of units \| multi-familyProperty									288
Sales Price									$ 53,750,000
Gain on sale of real estate		12,961,000
Unconsolidated Joint Ventures \| San Antonio, Texas \| Property dispositions \| Unconsolidated Joint Venture, The Verandas At Shavano
Schedule of Equity Method Investments [Line Items]
Gain on sale of real estate		23,652,000
Unconsolidated Joint Ventures \| San Antonio, Texas \| Property dispositions \| Subsequent Event
Schedule of Equity Method Investments [Line Items]
Number of units \| multi-familyProperty					268
Sales Price					$ 68,500,000
Unconsolidated Joint Ventures \| Kannapolis, NC \| Property dispositions \| Subsequent Event
Schedule of Equity Method Investments [Line Items]
Percentage of equity interest sold	65.00%
Number of units \| multi-familyProperty	312
Sales Price	$ 92,000,000
Unconsolidated Joint Ventures \| Stono Oaks. Johns Island, SC \| Development Property \| VIE
Schedule of Equity Method Investments [Line Items]
Number of units \| property_unit								240
Additional interest acquired								17.45%
Purchase price		$ 2,122,000						$ 3,500,000
Unconsolidated Joint Ventures \| Verandas at Alamo, San Antonio, TX
Schedule of Equity Method Investments [Line Items]
Mortgage debt outstanding							$ 27,000,000
Unconsolidated Joint Ventures \| Verandas at Alamo, San Antonio, TX \| VIE \| Property Acquisition
Schedule of Equity Method Investments [Line Items]
Purchase price							$ 8,721,000
Unconsolidated Joint Ventures \| Verandas at Alamo, San Antonio, TX \| VIE \| Property Acquisition \| Mortgages payable
Schedule of Equity Method Investments [Line Items]
Interest rate							3.64%
Unconsolidated Joint Ventures \| Verandas at Alamo, San Antonio, TX \| Multi-family \| VIE \| Property Acquisition
Schedule of Equity Method Investments [Line Items]
Number of units \| multi-familyProperty							288
Additional interest acquired							28.10%
Unconsolidated Joint Ventures \| Vanguard Heights, Creve Coeur, MO \| Subsequent Event
Schedule of Equity Method Investments [Line Items]
Mortgage debt outstanding						$ 29,700,000
Unconsolidated Joint Ventures \| Vanguard Heights, Creve Coeur, MO \| VIE \| Property Acquisition \| Subsequent Event
Schedule of Equity Method Investments [Line Items]
Purchase price						$ 4,800,000
Unconsolidated Joint Ventures \| Vanguard Heights, Creve Coeur, MO \| VIE \| Property Acquisition \| Mortgages payable \| Subsequent Event
Schedule of Equity Method Investments [Line Items]
Interest rate						4.41%
Unconsolidated Joint Ventures \| Vanguard Heights, Creve Coeur, MO \| Multi-family \| VIE \| Property Acquisition \| Subsequent Event
Schedule of Equity Method Investments [Line Items]
Number of units \| multi-familyProperty						174
Additional interest acquired						21.60%