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of Transaction Investment, Name [Domain] Investment, Name [Domain] Number of consecutive quarters without causing a default event Debt Instrument, Waiver, Number of Consecutive Quarters Without Causing Event of Default Debt Instrument, Waiver, Number of Consecutive Quarters Without Causing Event of Default 2027 Long-Term Debt, Maturity, Year One Long-term Debt, Type [Domain] Long-Term Debt, Type [Domain] Net loss per share attributable to common stockholders - Basic (in dollars per share) Earnings Per Share, Basic Actual Variable Management Fee Actual Variable Management Fee [Member] Actual Variable Management Fee Schedule of Equity Based Compensation Disclosure of Share-Based Compensation Arrangements by Share-Based Payment Award [Table Text Block] Statistical Measurement [Axis] Statistical Measurement [Axis] Interest expense associated with property in receivership Interest Expense, Nonoperating, Property In Receivership Interest Expense, Nonoperating, Property In Receivership Insider Trading Arrangements [Line Items] Deferred tax asset, valuation allowance (as a percent) Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Percent Award Type [Axis] Award Type [Axis] Named Executive Officers, Footnote Named Executive Officers, Footnote [Text Block] Operating loss before gain on disposition of real estate investments Operating Income (Loss) Before Gain (Loss) On Disposition Of Real Estate Operating Income (Loss) Before Gain (Loss) On Disposition Of Real Estate Authorized for grant percentage Common Stock, Shares Authorized For Grant, Percentage Common Stock, Shares Authorized For Grant, Percentage Accumulated deficit Retained Earnings (Accumulated Deficit) Net (decrease) in cash and cash equivalents Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Excluding Exchange Rate Effect, Continuing Operation Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table [Member] Awards Close in Time to MNPI Disclosures Awards Close in Time to MNPI Disclosures [Table] Class A Common Stock Common Stock [Member] Fair Value Measurement [Domain] Fair Value Measurement [Domain] Compensation Actually Paid vs. Company Selected Measure Compensation Actually Paid vs. Company Selected Measure [Text Block] Cover [Abstract] Cover [Abstract] Encumbered Properties Number of Real Estate Properties, Encumbered Number of Real Estate Properties, Encumbered Equity Awards Adjustments Equity Awards Adjustments [Member] Total liabilities and equity Liabilities and Equity Employee Stock Option Share-Based Payment Arrangement, Option [Member] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Additional 402(v) Disclosure Additional 402(v) Disclosure [Text Block] Plan Name [Axis] Plan Name [Axis] Related Party [Domain] Related and Nonrelated Parties [Domain] Tabular List, Table Tabular List [Table Text Block] Vesting [Axis] Vesting [Axis] Additional paid-in capital Additional Paid in Capital Intangible Asset, Finite-Lived, after Accumulated Amortization [Abstract] Intangible Asset, Finite-Lived, after Accumulated Amortization [Abstract] Net rentable area (sqft) Net Rentable Area Other income Other Nonoperating Income (Expense) Actual Base Management Fee Actual Base Management Fee [Member] Actual Base Management Fee 2031 Intangible Asset, Finite-Lived, Estimated Amortization Expense, Year Five Total Stockholders’ Equity Parent [Member] 2029 Intangible Asset, Finite-Lived, Estimated Amortization Expense, Year Three 2026 (remainder) Intangible Asset, Finite-Lived, Estimated Amortization Expense, Remainder of Fiscal Year Name Awards Close in Time to MNPI Disclosures, Individual Name Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested [Member] Forfeitures (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Forfeited in Period Base asset management fee as a percentage of benchmark Related Party Transaction, Base Asset Management Fee Related Party Transaction, Base Asset Management Fee Common stock issued to the Advisor (in shares) Shares Issued (in shares) Stock Issued During Period, Shares, Issued For Management Fees Stock Issued During Period, Shares, Issued For Management Fees General and administrative General and Administrative Expense Preferred stock, shares authorized (in shares) Preferred Stock, Shares Authorized Related party initial term Property Management Agreement, Term Property Management Agreement, Term Property, Plant, and Equipment [Table] Property, Plant, and Equipment [Table] Preferred stock, $0.01 par value, 50,000,000 shares authorized, none issued and outstanding at June 30, 2026 and December 31, 2025 Preferred Stock, Value, Issued Adjustment to Compensation: Adjustment to Compensation [Axis] 196 Orchard Street Mortgage note payable — 196 Orchard Street 196 Orchard Street [Member] 196 Orchard Street [Member] Number of real estate properties Number of Real Estate Properties Class of Stock [Domain] Class of Stock [Domain] Rule 10b5-1 Arrangement Terminated Rule 10b5-1 Arrangement Terminated [Flag] Aggregate Erroneous Compensation Amount Aggregate Erroneous Compensation Amount Cash paid for interest Interest Paid, Excluding Capitalized Interest, Operating Activity Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Schedule of Stock by Class Schedule of Stock by Class [Table Text Block] Aggregate Available Trading Arrangement, Securities Aggregate Available Amount Average market capitalization to be not less than Average Market Capitalization, Minimum Average Market Capitalization, Minimum Name Measure Name Income Taxes Income Tax Disclosure [Text Block] Pay vs Performance Disclosure [Line Items] Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] 2026 (remainder) Amortization Income Net Remainder​ Of​ Fiscal​ Year Amortization Income Net Remainder​ Of​ Fiscal​ Year Debt Instrument [Line Items] Debt Instrument [Line Items] Gain on disposition of real estate investments Gain (Loss) on Sale of Other Investments Pay vs Performance Disclosure Pay vs Performance Disclosure [Table] Additional Paid-in Capital Additional Paid-in Capital [Member] Entity Filer Category Entity Filer Category Related party extended initial term Property Management Agreement, Term Of Extension Property Management Agreement, Term Of Extension Name Trading Arrangement, Individual Name Cash and cash equivalents Cash and Cash Equivalent Lease expense Operating Lease, Expense Economic Dependency [Abstract] Economic Dependency [Abstract] Economic Dependency [Abstract] Company Selected Measure Amount Company Selected Measure Amount Beginning balance, unvested (in shares) Ending balance, unvested (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Non-Option Equity Instruments, Outstanding, Number Below-market lease liabilities, net Below Market Lease, Net American Strategic Investment Co. American Strategic Investment Co. [Member] American Strategic Investment Co. Equity-based compensation (in shares) Shares Issued, Shares, Share-Based Payment Arrangement, after Forfeiture Schedule of Stock by Class [Table] Stock, Class of Stock [Table] Net loss Net Income (Loss), Including Portion Attributable to Noncontrolling Interest 2031 Long-Term Debt, Maturity, Year Five Non-PEO NEO Non-PEO NEO [Member] Entity Address, Address Line One Entity Address, Address Line One Vested (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value Percentage of management fees earned Related Party Transaction, Property Management Fees Earned by Related Party, Percentage of Benchmark Related Party Transaction, Property Management Fees Earned by Related Party, Percentage of Benchmark Income tax expense Income tax expense Income Tax Expense (Benefit) Risks and Uncertainties [Abstract] Forfeiture of restricted shares (in shares) Stock Issued During Period, Shares, Restricted Stock Award, Forfeited Award Timing Method Award Timing Method [Text Block] Termination After June 30, 2020 Termination After June 30, 2020 [Member] Termination After June 30, 2020 Principles of Consolidation Consolidation, Policy [Policy Text Block] Net change in cash, cash equivalents and restricted cash Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Including Exchange Rate Effect and Discontinued Operation Forgone Recovery, Explanation of Impracticability Forgone Recovery, Explanation of Impracticability [Text Block] Net loss Net Income (Loss) Attributable to Parent Long-term Debt, Type [Axis] Long-Term Debt, Type [Axis] Erroneous Compensation Analysis Erroneous Compensation Analysis [Text Block] Statement [Table] Statement [Table] Above-market lease intangibles Above-market lease assets Above Market Leases [Member] Restatement Determination Date: Restatement Determination Date [Axis] Buildings and improvements Buildings, Fixtures And Improvements Buildings, Fixtures And Improvements Share-based Payment Arrangement, Nonemployee Share-Based Payment Arrangement, Nonemployee [Member] 400 E. 67th Street Laurel Condominium And 200 Riverside Boulevard Mortgage note payable — 400 E. 67th Street - Laurel Condominium / 200 Riverside Boulevard - ICON Garage 400 E. 67th Street Laurel Condominium And 200 Riverside Boulevard [Member] 400 E. 67th Street Laurel Condominium And 200 Riverside Boulevard [Member] Proceeds from notes payable to related parties Proceeds from Notes Payable Mortgage notes payable, net Mortgage notes payable, net Secured Debt, Net Of Deferred Financing Costs Secured Debt, Net Of Deferred Financing Costs Lessee Accounting Lessee, Leases [Policy Text Block] Schedule of Fees, Expenses and Related Payables Schedule of Amount Contractually Due and Forgiven in Connection With Operation Related Services [Table Text Block] Schedule of Amount Contractually Due and Forgiven in Connection With Operation Related Services [Table Text Block] Pension Benefits Adjustments, Footnote Pension Benefits Adjustments, Footnote [Text Block]