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Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount, Total Unrecognized share-based compensation cost related to unvested restricted stock awards Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount Long-term Line of Credit, Total Line of credit, outstanding borrowings Line of credit borrowing Line of credit Operating Lease, Right-of-Use Asset, Periodic Reduction Amortization Expense Long-Term Debt, Maturity, Year Three 2029 Debt instrument interest rate Debt Instrument, Basis Spread on Variable Rate Commitments and contingencies Commitments and Contingencies Average number of common shares outstanding - diluted Diluted Weighted Average Number of Shares Outstanding, Diluted Minimum Minimum [Member] Real Estate Assets Real Estate, Policy [Policy Text Block] Long-Term Debt, Maturity, Year Two 2028 Establishment Of Operating Lease Right Of Use Assets And Lease Liabilities. 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Gross Unrealized Gains Equity Securities Unrealized Gain Equity securities unrealized gain. Dividends payable Dividends Payable Summary of Performance Based Grant Activity Schedule of Nonvested Performance-Based Units Activity [Table Text Block] Stock vested percentage based on achievement of goal Sharebased Compensation Arrangement By Sharebased Payment Award Award Vesting Rights Percentage Based On Achievement Of Goal Sharebased compensation arrangement by sharebased payment award award vesting rights percentage based on achievement of goal. Number of contract Number Of Contract Number of contract. Investments [Domain] Investments Debt instrument interest rate Debt Instrument, Interest Rate, Stated Percentage Schedule Of Share Based Compensation Arrangements By Share Based Payment Award [Table] Schedule of Share-Based Compensation Arrangements by Share-Based Payment Award [Table] Unamortized Debt Issuance Expense Less: Loan procurement costs, net Loan procurement costs Total assets Assets Title of 12(b) Security Title of 12(b) Security Goodwill, Ending Balance Goodwill, Beginning Balance Goodwill, Total Goodwill Goodwill Preferred stock, $0.01 par value: 50,000,000 shares authorized; no shares outstanding Preferred Stock, Value, Issued, Ending Balance Preferred Stock, Value, Issued, Beginning Balance Preferred Stock, Value, Issued, Total Preferred Stock, Value, Issued Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number Unvested Ending, Shares Unvested Beginning, Shares B Riley Securities Inc [Member] B Riley Securities Inc [Member] B. 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(The Agent) Notional Amount Derivative, Notional Amount Variable Rate Variable Rate [Axis] Cash paid for interest Interest Paid, Excluding Capitalized Interest, Operating Activity Location, Statement of Financial Position, Balance [Axis] Real Estate [Abstract] Organization Nature of Operations [Text Block] Restricted stock grant forfeitures, shares Stock Issued During Period, Shares, Restricted Stock Award, Forfeited Restricted stock grant forfeitures, shares Restricted stock grants forfeitures, shares Leases Lessee, Operating Leases [Text Block] Cost Basis Equity Securities, FV-NI, Cost Beginning Balances Ending Balance Equity, Attributable to Parent Total stockholders' equity Entity Address, Address Line Two Entity Address, Address Line Two Earnings Per Share Earnings Per Share [Text Block] Notes Payable, Fair Value Disclosure Estimated fair value of debt Earnings per common share Net Income Loss Per Share Abstract Net Income Loss Per Share Abstract Basis of Presentation Basis of Accounting, Policy [Policy Text Block] Credit Facility Credit Facility [Axis] Revolving Line of Credit Revolving Credit Facility [Member] Vested, Weighted-Average Grant-Date Fair Value Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value Geographical Geographical [Domain] Value Investments in securities Equity Securities, FV-NI, Current Future Principal Payment Requirements Schedule of Maturities of Long-Term Debt [Table Text Block] Statistical Measurement Statistical Measurement [Axis] Entity Interactive Data Current Entity Interactive Data Current Lessee, Operating Lease, Liability, to be Paid, Year Three Future minimum lease payments 2027 Common Stock, Value, Issued, Ending Balance Common Stock, Value, Issued, Beginning Balance Common Stock, Value, Issued, Total Common Stock, Value, Issued Common stock, $0.01 par value: 450,000,000 shares authorized; 11,421,420 shares and 11,364,278 shares issued and outstanding at June 30, 2026 and December 31, 2025, respectively Computation of Basic and Diluted Earnings Per Share Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Total liabilities Liabilities Ownership Ownership [Domain] Prepaid expenses and other assets Increase (Decrease) in Prepaid Expenses, Other Initial Premium Cost Of The Initial Premium Cost of the initial premium. 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Stock Issued During Period, Shares, New Issues Aggregate shares of common stock added Marketable Securities, Unrealized Gain (Loss), Total Marketable Security, Unrealized Gain (Loss) Unrealized gain (loss) on marketable equity securities Unrealized (gain) loss on marketable equity securities Other property related income Real Estate, Other [Member] Variable Rate [Domain] Variable Rate Accounts Payable and Accrued Expenses Accounts Payable And Accrued Expenses Policy [Text Block] Accounts payable and accrued expenses. 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Capital Stock [Table] Capital Stock [Table] Investment Type Investment Type [Axis] Assets, Fair Value Disclosure, Total Total assets at fair value Assets, Fair Value Disclosure Document Transition Report Document Transition Report Performance-Based Restricted Stock Grants Performance-Based Restricted Stock Grants Performance Based Restricted Stock Grants [Member] Performance based restricted stock grants. Commitments and Contingencies Disclosure [Abstract] Shares eligible vesting period Share Based Compensation Arrangement By Share Based Payment Award Eligible To Vest On Each Tranche Period Share based compensation arrangement by share based payment award eligible to vest on each tranche period. Share-Based Payment Arrangement [Abstract] Summary Of Significant Accounting Policies [Line Items] Summary Of Significant Accounting Policies [Line Items]. Summary Of Significant Accounting Policies [Line Items] Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value, Ending Balance Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value, Beginning Balance Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value Level 3, assets value Unadvanced Amount of Second Amended Credit Facility Loan Agreement Less than or Equal to Fifty Percent Unadvanced Amount of Second Amended Credit Facility Loan Agreement Less than or Equal to Fifty Percent [Member] Unadvanced amount of Second Amended Credit Facility Loan Agreement less than or equal to fifty percent. Common Stock Common Stock [Member] Derivatives Derivative Instruments and Hedging Activities Disclosure [Text Block] Credit Facility Credit Facility [Domain] Statistical Measurement Statistical Measurement [Domain] Other income (expense) Nonoperating Income (Expense) [Abstract] Notes Payable, Total Note payable, net Notes Payable Schedule Of Available For Sale Securities [Line Items] Debt Securities, Available-for-Sale [Line Items] Equity, Attributable to Parent [Abstract] Stockholders' equity Weighted Average Number of Shares Outstanding, Basic, Total Average number of common shares outstanding - basic Basic Weighted Average Number of Shares Outstanding, Basic Services agreement original terms Services Agreement Original Terms Services agreement original terms. Assets Assets [Abstract] Entity Central Index Key Entity Central Index Key Current Fiscal Year End Date Current Fiscal Year End Date Derivative [Table] Derivative [Table] Document Quarterly Report Document Quarterly Report Debt instrument maturity date Debt Instrument, Maturity Date Long-Term Debt, Maturity, Remainder of Fiscal Year 2026 (6 months) Level 2 Fair Value, Inputs, Level 2 [Member] Risk And Uncertanties [Text Block] Risk and Uncertanties Risks and Uncertainties Notes Payable [Abstract] Net cash provided by operating activities Cash Provided by (Used in) Operating Activity, Including Discontinued Operation Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Earnings Per Share, Diluted, Total Diluted Earnings Per Share, Diluted McCordsville, IN Mc Cordsville Indiana [Member] McCordsville, Indiana. Dividends, Total Dividends Dividends Preferred stock, par value Preferred stock, par value Preferred Stock, Par or Stated Value Per Share Operating lease weighted average discount rate percent Operating Lease, Weighted Average Discount Rate, Percent Net income Net income and comprehensive income Ownership Ownership [Axis] Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] Change in operating lease right-of-use assets. Change in Operating Lease Right-of-use Assets Operating lease right-of-use assets Operating lease right-of-use assets Second Amended Credit Facility Second Amended Credit Facility [Member] Second amended credit facility. Measurement Frequency Measurement Frequency [Domain] Equity Components Equity Components [Axis] Cash flows from investing activities Cash Provided by (Used in) Investing Activity, Including Discontinued Operation [Abstract] Statement of Cash Flows [Abstract] Fair Value Hierarchy and NAV Fair Value Hierarchy and NAV [Domain] Aggregate offering price Aggregate Offering Price Aggregate offering price Number of Same Store Properties Owned Number of same store properties owned. Number of same-store properties owned Revenue and Expense Recognition Revenue [Policy Text Block] Shares measured weighted performance cycle Share Based Compensation Arrangement By Share Based Payment Award Award Weighted Rights Percentage Based On Performance Cycle Share based compensation arrangement by share based payment award award weighted rights percentage based on performance cycle. Fair Value Measurements Fair Value Disclosures [Text Block] Restricted Cash and Cash Equivalents, Total Restricted cash Restricted Cash and Cash Equivalent Stock Issued During Period, Shares, Restricted Stock Award, Gross Restricted stock grants issued, shares Depreciation, Depletion and Amortization, Total Depreciation and amortization Depreciation, Depletion and Amortization Preferred stock, shares authorized Preferred stock, shares authorized Preferred Stock, Shares Authorized Loan Procurement Costs Loan Procurement Costs Policy [Text Block] Loan procurement costs. Derivative Contract Derivative Contract [Domain] Number of owned self-storage properties Number of Stores Number of operating segment Number of Operating Segments Increase (Decrease) in Accounts Payable and Accrued Liabilities, Total Accounts payable and accrued expenses Increase (Decrease) in Accounts Payable and Accrued Liabilities Stock-based Compensation Compensation Related Costs, Policy [Policy Text Block] Improvements and equipment additions Payments To Acquire Improvements And Equipment Payments to acquire improvements and equipment. Operating Segments Segment Reporting, Policy [Policy Text Block] Term Loan Promissory Note Term Loan Promissory Note [Member] Term loan promissory note. Amended credit facility promissory note member. Amended Credit Facility Promissory Note Member Amended Credit Facility Promissory Note Share Based Compensation Arrangement By Share Based Payment Award [Line Items] Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] Percentage of real estate investment trust taxable income distributed for exemption of federal income tax Percentage Of Real Estate Investment Trust Taxable Income Distributed For Exemption Of Federal Income Tax Percentage of real estate investment trust taxable income distributed for exemption of federal income tax. Dividends, Common Stock Dividends, Common Stock, Total Common stock dividends Document Type Document Type Cash flows from operating activities Cash Provided by (Used in) Operating Activity, Including Discontinued Operation [Abstract] Segment Reporting, CODM, Individual Title and Position or Group Name [Extensible Enumeration] Liabilities and Equity [Abstract] Liabilities and equity Operating income Operating Income (Loss) Unrealized gain loss on interest rate cap premium. Unrealized Gain loss On Interest Rate Cap Premium Unrealized (gain) loss on interest rate cap premium Unrealized (gain) loss on interest rate cap premium Change in operating lease liabilities. Change in Operating Lease Liabilities Operating lease liabilities Marketable Equity Securities Marketable Securities, Policy [Policy Text Block] Entity File Number Securities Act File Number Notes payable. Carrying Value of Note Payable Notes Payable Table [Text Block] Summary of Future Minimum Lease Payments Lessee, Operating Lease, Liability, to be Paid, Maturity [Table Text Block] Evaluation of Asset Impairment Long-Lived Asset, Excluding Intangible Asset and Goodwill, Impairment and Disposal [Policy Text Block] Retained Earnings [Member] Accumulated Deficit Marketable Equity Securities Investment in Debt and Equity Securities and Other Trading Assets [Text Block] Entity Registrant Name Entity Registrant Name Accounting Policies [Abstract] Net Income (Loss), Including Portion Attributable to Noncontrolling Interest, Total Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Net income Entity Address, Address Line One Entity Address, Address Line One Summary Of Significant Accounting Policies [Table] Summary Of Significant Accounting Policies [Table] Summary Of Significant Accounting Policies [Table] Global Self Storage, Inc Global Self Storage Inc [Member] Global Self Storage Inc. Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Table] Fair Value, Recurring and Nonrecurring [Table] Midas Management Corporation [Member] Midas Management Corporation [Member] MMC Derivative Financial Instruments Derivatives, Policy [Policy Text Block] Supplemental cash flow and noncash information Supplemental Cash Flow Information [Abstract] Related Party Transactions Related Party Transactions Disclosure [Text Block] Entity Small Business Entity Small Business Second amended credit cacility promissory note. Second Amended Credit Facility Promissory Note [Member] Second Amended Credit Facility Promissory Note Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value Forfeited, Weighted-Average Grant-Date Fair Value Long-term Debt, Type Long-Term Debt, Type [Axis] Summary of Significant Accounting Policies Significant Accounting Policies [Text Block] Earnings per share Earnings Per Share [Abstract] Derivative Asset, Total Derivative Asset Interest rate cap Lessee, Operating Lease, Liability, to be Paid, Year Four Future minimum lease payments 2028 Buildings, improvements, and equipment Real Estate Investment Buildings Improvements And Equipment Real estate investment buildings, improvements, and equipment. Aggregate administrative and support function expenses accrued and paid Aggregate administrative and support function expenses accrued and paid. Plan Name Plan Name [Axis] Debt Issuance Costs, Line of Credit Arrangements, Net, Total Line of credit issuance costs, net Debt Issuance Costs, Line of Credit Arrangements, Net Equity [Abstract] Product and Service Product and Service [Domain] Measurement Frequency Measurement Frequency [Axis] Cash flows from financing activities Cash Provided by (Used in) Financing Activity, Including Discontinued Operation [Abstract] Rule 10b51 Arr Modified Flag Rule 10b51 Arr modified flag. Rule 10b5-1 Arrangement Modified Reconciliation of Cash, Cash Equivalents, and Restricted Cash Restrictions on Cash and Cash Equivalents [Table Text Block] Entity Tax Identification Number Entity Tax Identification Number Derivative Instrument Derivative Instrument [Axis] Equity Component Equity Component [Domain] Entity Address, City or Town Entity Address, City or Town Real Estate Assets Real Estate Disclosure [Text Block] Restricted stock grant forfeitures Stock Issued During Period, Value, Restricted Stock Award, Forfeitures Restricted stock grant forfeiture Restricted stock grants forfeiture Annual unused facility fee description Line of Credit Facility, Commitment Fee Description Long-Term Debt, Maturity, Year One 2027 Strike Derivative Strike Price Percentage Derivative strike price percentage. Undistributed Earnings (Loss) Allocated to Participating Securities, Basic, Total Undistributed Earnings (Loss) Allocated to Participating Securities, Basic Earnings and dividends allocated to participating securities Earnings and dividends allocated to participating securities Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Summary of Carrying Value of Real Estate Assets Summary Of Carrying Value Of Real Estate Assets Table [Text Block] Summary of carrying value of real estate assets. Unadvanced Amount of Second Amended Credit Facility Loan Agreement Greater than Fifty Percent Unadvanced Amount of Second Amended Credit Facility Loan Agreement Greater than Fifty Percent [Member] Unadvanced amount of Second Amended Credit Facility Loan Agreement greater than fifty percent. Weighted average common shares outstanding: Weighted average shares outstanding Weighted Average Number of Shares Outstanding, Diluted [Abstract] Statement [Table] Statement [Table] PEO Affiliated Entity [Member] Affiliated Entity Schedule Of Real Estate Properties [Table] Real Estate Property, Ownership [Table] Entity Shell Company Entity Shell Company Net cash used in investing activities Cash Provided by (Used in) Investing Activity, Including Discontinued Operation Property operations Property Operations Property operations. Statement [Line Items] Statement [Line Items] Accounts Payable and Accrued Liabilities, Total Accounts payable and accrued expenses Accounts Payable and Accrued Liabilities Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Total note payable, net Notes Payable Net Notes payable net. MMC and Winco M M C And Winco [Member] MMC and Winco. Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period Vested, Shares Maximum Maximum [Member] Assets transferred from level 1 to level 2 Fair Value, Assets, Level 1 to Level 2 Transfers, Amount Fair Value of Assets Level1 To Level2 Transfers Amount Fair value of assets level1 To level2 transfers amount. Sale of Stock [Domain] First Anniversary Amended Credit Facility Promissory Note [Member] First anniversary amended credit facility promissory note. 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City Area Code City Area Code Assets and Liabilities Carried at Fair Value Measured on Recurring Basis Fair Value, Assets Measured on Recurring Basis [Table Text Block] Unrecognized Tax Benefits, Ending Balance Unrecognized Tax Benefits, Beginning Balance Unrecognized tax benefits Unrecognized Tax Benefits Organization, Consolidation and Presentation of Financial Statements [Abstract] Note payable, net book value Debt Instrument, Collateral Amount Leasable Square Feet Gross square feet of traditional drive-up storage units and all-climate-controlled units Leasable square feet. Cash, Cash Equivalents, and Restricted Cash Cash and Cash Equivalents, Restricted Cash and Cash Equivalents, Policy [Policy Text Block] Expenses Operating Expenses [Abstract] Millbrook, NY Millbrook N Y [Member] Millbrook, NY. 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Debt Instrument, Variable Interest Rate, Type [Extensible Enumeration] Derivative Instruments and Hedging Activities Disclosure [Abstract] Defined Contribution Plan, Cost Allocated matching expense Long-Term Debt, Maturity, Year Four 2030 Trading Symbol Trading Symbol Geographical Geographical [Axis] Revenues Revenue from Contract with Customer, Including Assessed Tax Maturity Date Derivative, Contract End Date Number of shares, granted Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period Granted, Shares Entity Emerging Growth Company Entity Emerging Growth Company Additional Paid-in Capital [Member] Additional Paid in Capital Principal balance outstanding Total principal payments Borrowing principal amount Long-Term Debt, Gross Plan Name Plan Name [Domain] Capital Stock Capital Stock [Text Block] Capital stock. Payments of Dividends, Total Dividends paid Payments of Dividends Self storage properties Real Estate Investment Property, at Cost Number of non same-store properties owned Number of Non Same Store Properties Owned Number of non same store properties owned. Supplemental disclosure of noncash activities: Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract] Cover [Abstract] Annual unused facility fee percentage Line of Credit Facility, Unused Capacity, Commitment Fee Percentage Marketable Securities [Table] Operating lease weighted average remaining lease term Operating Lease, Weighted Average Remaining Lease Term Reimbursement of monthly automobile expenses Reimbursement Of Automobile Expenses Reimbursement of automobile expenses. Long-term Debt, Type Long-Term Debt, Type [Domain] Less: Accumulated depreciation Real Estate Investment Property, Accumulated Depreciation Real estate assets, net Real estate assets, net Real Estate Investment Property, Net Share based compensation description Share-Based Compensation Arrangement by Share-Based Payment Award, Description Credit Risk Concentration Risk, Credit Risk, Policy [Policy Text Block] Estimated useful lives of buildings and improvements Property, Plant, and Equipment, Useful Life Share-based Payment Arrangement, Noncash Expense, Total Recorded expense in general and administrative expense in its statement of operations related to restricted stock Stock-based compensation Share-Based Payment Arrangement, Noncash Expense Additional Paid in Capital, Ending Balance Additional Paid in Capital, Beginning Balance Additional Paid in Capital, Total Additional paid in capital Additional Paid in Capital Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity [Abstract] Adjustments to reconcile net income to net cash provided by operating activities Effective Date Derivative, Inception Date Fair Value Disclosures [Abstract] Cash and Cash Equivalent Cash and Cash Equivalents, at Carrying Value, Ending Balance Cash and Cash Equivalents, at Carrying Value, Beginning Balance Cash and Cash Equivalents, at Carrying Value, Total Cash and cash equivalents Line of credit, issuance costs Payments of Debt Issuance Costs Issuance costs on renewal of revolving line of credit Cash Provided by (Used in) Financing Activity, Including Discontinued Operation Net cash used in financing activities Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability Value, Ending Balance Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability Value, Beginning Balance Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability Value Fair value, Liabilities value Level 3, liabilities value Net Income (Loss) Available to Common Stockholders, Basic Net income attributable to common stockholders Entity Filer Category Entity Filer Category Debt Instrument, Name [Domain] NOI Measure description Segment Reporting, CODM, Profit (Loss) Measure, How Used, Description Accounts receivable Increase (Decrease) in Accounts Receivable Dividend and interest income Other Interest and Dividend Income Entity Address, Postal Zip Code Entity Address, Postal Zip Code Management fees and other income Management Fees And Other Income [Member] Management fees and other income. Statement of Financial Position [Abstract] Local Phone Number Local Phone Number