Debt instrument maturity period.

No definition available.

Name:	brst_DebtInstrumentMaturityPeriod
Namespace Prefix:	brst_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Number of mortgage loan.

+ References

No definition available.

+ Details

Name:	brst_NumberOfMortgageLoan
Namespace Prefix:	brst_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Principal amount outstanding of loans held in portfolio to be matured within twelve months.

+ References

No definition available.

+ Details

Name:	brst_PrincipalAmountOutstandingOfLoansHeldInPortfolioToBeMaturedWithinTwelveMonths
Namespace Prefix:	brst_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 835
-SubTopic 30
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Publisher FASB
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-URI https://asc.fasb.org//1943274/2147482949/835-30-55-8

+ Details

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

- Definition

Description of the maturity date of the debt instrument including whether the debt matures serially and, if so, a brief description of the serial maturities.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(2))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1

+ Details

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

- 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

Amount of real estate investment property which may include the following: (1) land available-for-sale; (2) land available-for-development; (3) investments in building and building improvements; (4) tenant allowances; (5) developments in-process; (6) rental properties; and (7) other real estate investments.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 944
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(1)(d))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479440/944-210-S99-1

+ Details

Name:	us-gaap_RealEstateInvestmentPropertyAtCost
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
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_RealEstatePropertiesLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The cash outflow to repay long-term debt that is wholly or partially secured by collateral. Excludes repayments of tax exempt secured debt.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 15
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482740/230-10-45-15

+ Details

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

- Definition

The number of units or percentage investment held in the subsidiary by the limited liability company or limited partnership.

+ References

No definition available.

+ Details

Name:	us-gaap_SubsidiaryOfLimitedLiabilityCompanyOrLimitedPartnershipOwnershipInterest
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	srt_RangeAxis=srt_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentRedemptionPeriodAxis=brst_MortgageLoansDueWithinTwelveMonthsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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

- Details

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

- Details

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

- Details

Name:	srt_OwnershipAxis=brst_OperatingPartnershipMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Note 1 - Organization and Nature of Business (Details Textual) $ in Millions				9 Months Ended	12 Months Ended
	Oct. 31, 2023 USD ($)	Sep. 29, 2023 USD ($)	Jul. 20, 2023 USD ($)	Sep. 30, 2023 USD ($) MortgageLoan Property	Dec. 31, 2022	Dec. 31, 2019 USD ($)
Real Estate Properties [Line Items]
Total real estate properties held for investment, net				$ 372.7
Number of real estate properties \| Property				15
Maturity date description				the Basis Term Loan (as defined below) had an outstanding principal balance of $35.2 million as of September 30, 2023 and matures on January 1, 2024, subject to the remaining one-year extension option that is subject to certain conditions, including a material adverse change clause, and approval by the lender.
Mortgages with principal balances outstanding				$ 11.3
Minimum [Member]
Real Estate Properties [Line Items]
Short-term mortgages maturity period				3 years
Maximum [Member]
Real Estate Properties [Line Items]
Short-term mortgages maturity period				5 years
Mortgage Loans Due Within Twelve Months \| Mortgage Loan [Member]
Real Estate Properties [Line Items]
Number of mortgage loan \| MortgageLoan				1
Basis Term Loan [Member]
Real Estate Properties [Line Items]
Maturity date description				The Basis Term Loan initial maturity was January 1, 2023, subject to two one-year extension options, subject to certain conditions.
Mortgage loans				$ 35.2
Repayments of secured debt		$ 14.3	$ 17.4
Basis Term Loan [Member] \| Subsequent Event [Member]
Real Estate Properties [Line Items]
Repayments of secured debt	$ 12.8
Basis Term Loan [Member] \| Maximum [Member]
Real Estate Properties [Line Items]
Mortgage loans						$ 66.9
Operating Partnership [Member]
Real Estate Properties [Line Items]
Operating partnership percentage				85.60%	85.30%