Debt instrument maturity period.

No definition available.

Name:	brst_DebtInstrumentMaturityPeriod
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Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Description on optional extended redemption date.

+ References

No definition available.

+ Details

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- Definition

Number of mortgage loan.

+ References

No definition available.

+ Details

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Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Number of mortgaged properties.

+ References

No definition available.

+ Details

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Balance Type:	na
Period Type:	duration

- Definition

Outstanding preferred capital interest.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

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

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
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- Definition

Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

+ References

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

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

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+ Details

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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

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Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Description of debt redemption features under terms of the debt agreement.

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- Definition

The number of real estate properties owned as of the balance sheet date.

+ References

No definition available.

+ Details

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Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

The net cash inflow or outflow in aggregate debt due to repayments and proceeds from additional borrowings.

+ References

No definition available.

+ Details

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

- Definition

The cash inflow from the sale of formerly productive land held for sale, anything permanently fixed to it, including buildings, structures on it, and so forth.

+ References

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- 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.

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Balance Type:	debit
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- 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

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Balance Type:	na
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- 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

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Data Type:	dtr-types:percentItemType
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Period Type:	duration

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- Details

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Balance Type:
Period Type:

- Details

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- Details

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- Details

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- Details

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Note 1 - Organization and Nature of Business (Details Textual) $ in Thousands				3 Months Ended	12 Months Ended
	May 26, 2023 USD ($)	May 16, 2023 USD ($)	May 05, 2023 USD ($)	Mar. 31, 2023 USD ($) MortgageLoan Property	Dec. 31, 2022	Dec. 31, 2019 USD ($)
Real Estate Properties [Line Items]
Real estate investments				$ 411,700
Number of real estate properties \| Property				17
Maturity date description				the Basis Term Loan (as defined below), has an outstanding balance of $66.9 million 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				$ 28,400
Long-term debt outstanding				$ 266,881
Subsequent Event [Member]
Real Estate Properties [Line Items]
Proceeds from sale of property		$ 23,000
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 Loan [Member]
Real Estate Properties [Line Items]
Long-term debt outstanding				$ 11,800
Mortgage Loans Due Within Twelve Months \| Mortgage Loan [Member]
Real Estate Properties [Line Items]
Number of mortgage loan \| MortgageLoan				3
Number of mortgaged properties \| Property				3
Mortgage Loans Refinanced May 05, 2023 [Member]
Real Estate Properties [Line Items]
Mortgage loans				$ 5,200
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				$ 66,900
Long-term debt outstanding				66,900
Basis Term Loan [Member] \| Subsequent Event [Member]
Real Estate Properties [Line Items]
Proceeds from sale of property	$ 23,100
Basis Term Loan [Member] \| Maximum [Member]
Real Estate Properties [Line Items]
Mortgage loans						$ 66,900
Lamont Street [Member]
Real Estate Properties [Line Items]
Outstanding preferred capital interest				$ 4,200
Description on optional extended redemption date				September 30, 2024 and September 30, 2025
Debt Instrument, Redemption, Description				The Lamont Street Preferred Interest (as defined below) had an outstanding balance of $4.2 million as of March 31, 2023 and must be redeemed on or before September 30, 2023
Highlandtown [Member] \| Subsequent Event [Member]
Real Estate Properties [Line Items]
Proceeds from refinance to repayment			$ 1,700
Operating Partnership [Member]
Real Estate Properties [Line Items]
Operating partnership percentage				85.40%	85.30%