Trading Arrangements, by Individual Trading Arrangements, by Individual [Table] Weighted average number of shares of common stock outstanding: Denominator for diluted earnings per share: Weighted Average Number of Shares Outstanding, Diluted [Abstract] Trading Arrangement: Trading Arrangement [Axis] Maximum Maximum [Member] Portion at Fair Value Measurement Portion at Fair Value Measurement [Member] Range [Domain] Statistical Measurement [Domain] Title of 12(b) Security Title of 12(b) Security Net loss available for common stockholders, diluted Net Income (Loss) Available to Common Stockholders, Diluted Subsequent Event Subsequent Event [Member] Document Fiscal Year Focus Document Fiscal Year Focus Weighted average interest rate percentage Debt, Weighted Average Interest Rate Adjustment to Compensation, Amount Adjustment to Compensation Amount Deduct earnings allocated to unvested restricted stock Deduct Earnings Allocated To Unvested Restricted Stock Deduct Earnings Allocated To Unvested Restricted Stock Common stock, $0.01 par value, 300,000 shares authorized; 18,026 and 17,919 shares outstanding Common Stock, Value, Issued Majestic Property Management Corporation Majestic Property Management Corporation [Member] Represents the Majestic Property Management Corporation (Majestic Property Management Corp.). Credit facility Line of Credit Line of Credit [Member] Restatement Determination Date Restatement Determination Date Amortization of deferred loan fee income Amortization of deferred loan fee income Amortization of Deferred Loan Origination Fees, Net Total debt obligations, net of deferred costs Long-Term Debt and Lease Obligation, Including Current Maturities Compensation expense - restricted stock and restricted stock units APIC, Share-Based Payment Arrangement, Restricted Stock Unit, Increase for Cost Recognition Stock dividends (in shares) Stock Dividends, Shares Loans Financing Receivables [Text Block] Junior subordinated notes Junior Subordinated Debt [Member] Amendment Flag Amendment Flag Treasury stock acquired, average cost per share (in dollars per share) Shares Acquired, Average Cost Per Share Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Accumulated depreciation Real Estate Investment Property, Accumulated Depreciation Gould Investors Limited Partnership Gould Investors Limited Partnership [Member] Represents the Gould Investors Limited Partnership (Gould Investors L.P.). 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Maximum borrowing capacity Line of Credit Facility, Maximum Borrowing Capacity Non-Rule 10b5-1 Arrangement Terminated Non-Rule 10b5-1 Arrangement Terminated [Flag] Debt Instrument, Variable Interest Rate, Type [Extensible Enumeration] Debt Instrument, Variable Interest Rate, Type [Extensible Enumeration] Incentive Plan 2024 Incentive Plan 2024 [Member] Incentive Plan 2024 Subsequent Event Type [Axis] Subsequent Event Type [Axis] Schedule of Long-term Debt Instruments [Table] Schedule of Long-Term Debt Instruments [Table] Loan receivables, net of deferred fees of $223 and $252 and allowance for credit loss of $275 and $275 Net carrying value Financing Receivable, Excluding Accrued Interest, after Allowance for Credit Loss Yonkers, NY. Yonkers, NY [Member] New Accounting Pronouncements New Accounting Pronouncements, Policy [Policy Text Block] Land Land [Member] Non- Controlling Interest Noncontrolling Interest [Member] Use of Estimates Use of Estimates, Policy [Policy Text Block] Amortization of deferred financing costs Amortization of Debt Issuance Costs Related Party [Axis] Related and Nonrelated Parties [Axis] Real Property Management Real Estate Brokerage and Construction Supervision Services Real Property Management Real Estate Brokerage And Construction Supervision Services [Member] Represents the related party transaction for real property management, real estate brokerage and construction supervision services. 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[Text Block] Distributions - common stock (in dollars per share) Common Stock, Dividends, Per Share, Cash Paid ivic Center 2 - Southaven, MS Multi-Family Property Mortgage Civic Center 2 - Southaven, MS Multi-Family Property Mortgage [Member] Civic Center 2 - Southaven, MS Multi-Family Property Mortgage Entity Emerging Growth Company Entity Emerging Growth Company Equity Valuation Assumption Difference, Footnote Equity Valuation Assumption Difference, Footnote [Text Block] Related Party Transaction [Line Items] Related Party Transaction [Line Items] Invested Amount Unpaid principal balance Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss Underlying Security Market Price Change Underlying Security Market Price Change, Percent Average maturity remaining Debt Instrument, Weighted Average Remaining Maturity Debt Instrument, Weighted Average Remaining Maturity Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of 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Fair Value of Equity Award Amounts Reported in Summary Compensation Table [Member] Building Building [Member] Schedule of Real Estate Properties [Table] Real Estate Property, Ownership [Table] Aggregate Pension Adjustments Service Cost Aggregate Pension Adjustments Service Cost [Member] Multifamily Apartment Building [Member] Common stock, authorized (in shares) Common Stock, Shares Authorized Net loss per share amounts attributable to common stockholders: Earnings Per Share Reconciliation [Abstract] Real estate properties, net of accumulated depreciation and amortization of $146,212 and $132,821 Real estate investment property, net Real estate properties, net of accumulated depreciation of $103,044 and $95,747 Real Estate Investment Property, Net Shares sold in offering (in shares) Sale of Stock, Number of Shares Issued in Transaction Number of units Number of units Number of Units in Real Estate Property Exercise Price Award Exercise Price Cash flows from investing activities: Cash 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Including Discontinued Operation Real estate operating expenses - including $9 and $6 to related parties for the three months ended and $17 and $15 for the six months ended Real estate operating expenses Direct Operating Costs Income Statement [Abstract] BRT Apartments Corp. stockholders' equity: Equity, Attributable to Parent [Abstract] Improvements Real Estate Improvements And Other Additions Document Transition Report Document Transition Report Fair Value, Hierarchy [Axis] Fair Value Hierarchy and NAV [Axis] Investment, Name [Axis] Investment, Name [Axis] Expenses: Operating Expenses [Abstract] Stock Appreciation Rights (SARs) Stock Appreciation Rights (SARs) [Member] Basis spread on variable rate Debt Instrument, Basis Spread on Variable Rate Lessor, Lease, Description [Line Items] Lessor, Lease, Description [Line Items] City Area Code City Area Code Restricted Stock Restricted Stock [Member] Consolidated And Unconsolidated Subsidiaries Consolidated And Unconsolidated Subsidiaries 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[Text Block] Balance Sheet Location [Axis] Location, Statement of Financial Position, Balance [Axis] Statement [Table] Statement [Table] Discount from the market price (as percentage) Common Stock, Discount Dividend Rate, Percentage Common Stock, Discount Dividend Rate, Percentage Restatement Determination Date: Restatement Determination Date [Axis] Revenues: Revenues [Abstract] Pension Benefits Adjustments, Footnote Pension Benefits Adjustments, Footnote [Text Block] Secured Overnight Financing Rate (SOFR) [Member]