Document And Entity Information Marketable Securities, Policy [Policy Text Block] Statistical Measurement [Axis] Note To Financial Statement Details Textual Significant Accounting Policies Investment, Policy [Policy Text Block] Income tax provision Income Tax Expense (Benefit) Note 1 - Organization and Significant Accounting Policies ecd_NonRule10b51ArrTrmntdFlag Non-Rule 10b5-1 Arrangement Terminated [Flag] Note 2 - Advisory Services ecd_NonRule10b51ArrAdoptedFlag Non-Rule 10b5-1 Arrangement Adopted [Flag] Note 3 - Mortgage-backed Securities Trading Arrangements, by Individual [Table] Note 4 - Repurchase Agreements Material Terms of Trading Arrangement [Text Block] Note 5 - Pledged Assets Note 6 - Offsetting Assets And Liabilities Underlying Asset Class [Axis] Note 7 - Long-term Debt Financial Instrument [Axis] Investment in Debt and Equity Securities and Other Trading Assets [Text Block] Note 11 - Earnings Per Share Note 12 - Fair Value Minimum [Member] Note 13 - Segment Information Underlying Asset Class [Domain] Note 1 - Organization and Significant Accounting Policies - Summary of Cash, Cash Equivalents and Restricted Cash (Details) Statistical Measurement [Domain] Note 2 - Advisory Services - Advisory Service Revenue (Details) Maximum [Member] Note 3 - Mortgage-backed Securities - MBS Portfolio (Details) Share Repurchase Program [Axis] Note 3 - Mortgage-backed Securities - Net Gain (Loss) From Sale of MBS (Details) Share Repurchase Program [Domain] Note 4 - Repurchase Agreements - Schedule of Repurchase Agreements (Details) Note 5 - Pledged Assets - Schedule of Financial Instruments Owned and Pledged as Collateral (Details) Note 6 - Offsetting Assets And Liabilities - Offsetting of Liabilities (Details) Note 7 - Long-term Debt - Schedule of Debt (Details) Note 7 - Long-term Debt - Future Scheduled Principal Payments on Long-term Debt (Details) Schedule of Investments [Table] Note 11 - Earnings Per Share - Schedule of Earnings Per Share (Details) Note 12 - Fair Value - Schedule of Fair Value Assets and Liabilities Measured on Recurring Basis (Details) Note 13 - Segment Information - Schedule of Segment Information (Details) Note 13 - Segment Information - Assets in Each Reportable Segment (Details) Notes To Financial Statements Notes To Financial Statements [Abstract] Junior Subordinated Debt [Member] Compensation and related benefits Realized losses on mortgage-backed securities Realized losses on mortgage-backed securities Repurchase Agreements and Similar Transactions, Maturity Periods [Domain] Common Class C [Member] Maturity Overnight [Member] Repurchase Agreements and Similar Transactions, Maturity Periods [Axis] Financial Instruments [Domain] Other income (expense): Asset Pledged as Collateral [Member] Securities Sold under Agreements to Repurchase [Member] us-gaap_IncreaseDecreaseInAccruedInterestReceivableNet Accrued interest receivable Par Value The par value as of the balance sheet date of firm holdings in debt obligations issued by the US government including short-term Treasury bills, medium-term Treasury notes, and long-term Treasury bonds, as well as debt issued by agencies. Includes both pledged (to counterparties as collateral for financing transactions) and unpledged holdings. Maturity Less than 30 Days [Member] Net revenues bmnm_NetSegmentRevenue The amount of net segment revenue. Maturity 30 to 90 Days [Member] us-gaap_IncreaseDecreaseInInterestPayableNet Accrued interest payable Cost bmnm_FinancialInstrumentsOwnedUsGovernmentAndAgencyObligationsCost The cost of the balance sheet date of firm holdings in debt obligations issued by the US government including short-term Treasury bills, medium-term Treasury notes, and long-term Treasury bonds, as well as debt issued by agencies. Includes both pledged (to counterparties as collateral for financing transactions) and unpledged holdings. Maturity Greater than 90 Days [Member] us-gaap_SharesOutstanding Balances (in shares) Balances (in shares) Segment Reporting [Text Block] Adjustments to reconcile net income to net cash provided by (used in) operating activities: Preferred stock, $0.001 par value; 10,000,000 shares authorized; 100,000 shares designated Series A Junior Preferred Stock, 9,900,000 shares undesignated; no shares issued and outstanding as of March 31, 2026 and December 31, 2025 us-gaap_Liabilities Total Liabilities Segment Reporting, Reconciliation of Revenue by Segment to Consolidated [Table Text Block] LIABILITIES: Threatened Litigation [Member] Segment Reporting, Reconciliation of Asset by Segment to Consolidated [Table Text Block] Litigation Status [Axis] Litigation Status [Domain] us-gaap_LiabilitiesAndStockholdersEquity Total Liabilities and Stockholders' Equity Consolidation Items [Axis] Pledged Status [Domain] Segment Reporting [Table] Pledged Status [Axis] Expenses: us-gaap_SellingGeneralAndAdministrativeExpense Total expenses Subsequent Event [Member] Consolidation Items [Domain] Asset Not Pledged as Collateral [Member] Changes in operating assets and liabilities: Preferred stock, issued (in shares) Preferred stock, outstanding (in shares) Preferred stock, authorized (in shares) us-gaap_RevenuesNetOfInterestExpense Net revenues us-gaap_IncreaseDecreaseDueFromAffiliates Due from affiliates Preferred stock, par value (in dollars per share) us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect NET INCREASE (DECREASE) IN CASH, CASH EQUIVALENTS AND RESTRICTED CASH us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents Total cash, cash equivalents and restricted cash Series A Preferred Stock [Member] New Accounting Pronouncements, Policy [Policy Text Block] us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations CASH, CASH EQUIVALENTS AND RESTRICTED CASH, beginning of the period CASH, CASH EQUIVALENTS AND RESTRICTED CASH, end of the period Statement [Table] us-gaap_DebtInstrumentBasisSpreadOnVariableRate1 Debt Instrument, Basis Spread on Variable Rate us-gaap_EquityMethodInvestmentOwnershipPercentage Equity Method Investment, Ownership Percentage Net amount of balance sheet liabilities srt_StockRepurchaseProgramAuthorizedAmount1 Stock Repurchase Program, Authorized Amount Long-Term Debt, Type [Axis] Ownership [Axis] Ownership [Domain] us-gaap_PropertyPlantAndEquipmentUsefulLife Property, Plant and Equipment, Useful Life (Year) us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalRemainderOfFiscalYear Last nine months of 2026 bmnm_BusinessCombinationPurchasePricePercentOfRevenue Business Combination, Purchase Price, Percent of Revenue The purchase price of acquired business, as a percent of the business' revenue. Tom Johnson Investment Management, LLC (TJIM) [Member] Tom Johnson Investment Management, LLC (TJIM) bmnm_BusinessAcquisitionRemainingPercentageOfVotingInterests Business Acquisition, Remaining Percentage of Voting Interests The remaining percentage of voting interests. Gain (Loss) on Securities [Table Text Block] Schedule of Maturities of Long-Term Debt [Table Text Block] ASSETS: Measurement Frequency [Axis] Commitments and Contingencies Disclosure [Text Block] Statement [Line Items] Fair Value Hierarchy and NAV [Axis] Common stock, issued (in shares) Common stock, outstanding (in shares) Advisory Service [Member] Transaction between related party. Common stock, authorized (in shares) Common Class B [Member] Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] Common stock Fair Value of Financial Instruments, Policy [Policy Text Block] Accrued interest payable Schedule of Cash and Cash Equivalents [Table Text Block] us-gaap_PolicyTextBlockAbstract Accounting Policies us-gaap_DisclosureTextBlockAbstract Notes to Financial Statements us-gaap_TableTextBlock Notes Tables Computer Equipment [Member] Subsequent Events [Text Block] Concentration Risk Type [Axis] Related Party [Member] Consolidation, Variable Interest Entity, Policy [Policy Text Block] bmnm_DailyFeeRateMultipliedByRepurchaseAgreementsBalanceIfLessThanFiveBillion Daily Fee, Rate Multiplied By Repurchase Agreements Balance if Less than Five Billion The rate multiplied by repurchase agreement balance if less than 5 billion for daily fee. bmnm_DailyFeeRateMultipliedByRepurchaseAgreementsBalanceIfMoreThanFiveBillion Daily Fee, Rate Multiplied By Repurchase Agreements Balance if More than Five Billion The rate multiplied by repurchase agreement balance if more than five billion for daily fee. bmnm_ClearingAndOperationalServicesFeePerMonth Clearing and Operational Services Fee Per Month Amount of monthly clearing and operation services fee. Concentration Risk Type [Domain] Repurchase, Clearing and Administrative Fee [Member] Represents repurchase, clearing and administrative fee. us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo 2028 us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour 2030 us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree 2029 us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths 2027 Long-term debt Total Offsetting Assets [Table] us-gaap_LossContingencyAccrualAtCarryingValue Loss Contingency Accrual Statement of Stockholders' Equity [Abstract] Loss Contingency Nature [Axis] Statement of Cash Flows [Abstract] Long-Term Debt, Type [Domain] STOCKHOLDERS' EQUITY: Equity Components [Axis] Offsetting Liabilities [Table Text Block] Equity Component [Domain] Fair Value, Inputs, Level 2 [Member] Fair Value, Inputs, Level 3 [Member] Equity [Text Block] Fair Value, Inputs, Level 1 [Member] Additional Paid-in Capital [Member] Retained Earnings [Member] Loss Contingency, Nature [Domain] Property and equipment, net Subsequent Event Type [Domain] Subsequent Event [Table] Subsequent Event Type [Axis] Deferred tax assets, net Property, Plant, and Equipment [Policy Text Block] Fair Value Disclosures [Text Block] SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION: Due from affiliates Accounts Receivable, after Allowance for Credit Loss Net loss on sales of MBS us-gaap_RealizedInvestmentGainsLosses Customer Concentration Risk [Member] Revenue Benchmark [Member] Other Commitments [Table] Income (loss) before income taxes us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Net income before income tax provision us-gaap_DerivativeCollateralRightToReclaimSecurities Securities posted as collateral Organization, Consolidation and Presentation of Financial Statements Disclosure and Significant Accounting Policies [Text Block] Additional paid-in capital Debt Disclosure [Text Block] Segment Reporting, Policy [Policy Text Block] Use of Estimates, Policy [Policy Text Block] Orchid Island Capital [Member] In relation to Orchid Island Capital. us-gaap_MinorityInterestOwnershipPercentageByParent Noncontrolling Interest, Ownership Percentage by Parent us-gaap_DebtInstrumentCarryingAmount Long-Term Debt, Gross Collateralized Mortgage-Backed Securities [Member] us-gaap_DebtInstrumentFaceAmount Debt Instrument, Face Amount Debt Instrument, Name [Domain] Fair Value Measurement Inputs and Valuation Techniques [Table] us-gaap_DebtInstrumentInterestRateStatedPercentage Debt Instrument, Interest Rate, Stated Percentage us-gaap_DebtInstrumentInterestRateEffectivePercentage Debt Instrument, Interest Rate, Effective Percentage Class of Stock [Domain] Related and Nonrelated Parties [Axis] Breach Of Representations And Warranties [Member] In regards to breach of representations And warranties. Pledged Assets [Text Block] Offsetting Assets And Liabilities [Text Block] Schedule of Long-Term Debt Instruments [Table] Debt Instrument [Axis] CASH FLOWS FROM OPERATING ACTIVITIES: us-gaap_UnrealizedGainLossOnDerivatives Losses (gains) on TBA securities CASH FLOWS FROM INVESTING ACTIVITIES: us-gaap_NetCashProvidedByUsedInOperatingActivities NET CASH PROVIDED BY (USED IN) OPERATING ACTIVITIES CASH FLOWS FROM FINANCING ACTIVITIES: us-gaap_NetCashProvidedByUsedInInvestingActivities NET CASH PROVIDED BY INVESTING ACTIVITIES us-gaap_TreasuryStockAcquiredAverageCostPerShare Shares Acquired, Average Cost Per Share (in dollars per share) us-gaap_NetCashProvidedByUsedInFinancingActivities NET CASH USED IN FINANCING ACTIVITIES Operating Segments [Member] Accounting Policies [Abstract] Carrying value of MBS sold bmnm_InvestmentSalesCarryingValue The carrying value of investment sales. Segments [Domain] Segments [Axis] Gross Amount Of Financial Instruments Posted Not Offset in Balance Sheet [Member] Gross amount of financial instruments posted as collateral but not offset in the balance sheet. us-gaap_StockRepurchasedDuringPeriodShares Stock Repurchased During Period, Shares (in shares) Gross Amounts Of Cash Posted Not Offset In Balance Sheet [Member] Gross amount of cash received as collateral but not offset in the balance sheet. Net Amount Of Liabilities [Member] Represents the net amount of liabilities after netting collateral. Income Statement [Abstract] Gross Amount Of Recognized Liabilties [Member] Gross amount of liabilities prior to offsetting in the balance sheet. Intersegment Eliminations [Member] Gross Amount Of Liabilties Offset In The Balance Sheet [Member] Gross amount of assets offset against liabilities in the balance sheet. Net Amount Of Liabilities Presented In The Balance Sheet [Member] Net amount of liabilities presented in the balance sheet after netting. Allocated Overhead [Member] In reference to any direct expenses incurred on Bimini Advisors in relation to the management agreement with Orchid Island Capital. us-gaap_NumberOfOperatingSegments Number of Operating Segments us-gaap_NumberOfReportableSegments Number of Reportable Segments Schedule of Advisory Fee Income [Table Text Block] Tabular disclosure of Management and investment advisory fees including allocated overhead. Deferred income tax provision Preferred Undesignated [Member] Represents undesignated preferred stock. Proceeds from sales of MBS Sales Amount of cash inflow from sales of investments. Principal repayments Amount of cash inflow from principal repayments of investments. Income Tax Contingency [Table] Proceeds from repurchase agreements Amount of cash inflow from securities sold under agreement to repurchase. Office Furniture and Equipment [Member] In regards to office furniture and equipment. Net income Net income Gross gain on sales of MBS bmnm_GainOnSaleOfInvestment Amount of gain from sale of investments Basic and diluted bmnm_PaymentsForSecuritiesSoldUnderAgreementsToRepurchase Principal repayments on repurchase agreements The amount of cash outflow for payments for securities sold under agreements to repurchase. Advisory Services [Policy Text Block] Disclosure of accounting policy for advisory services. Advisory Services [Text Block] The entire disclosure for advisory services. Gross loss on sales of MBS bmnm_LossOnSaleOfInvestment Amount of loss from sale of investment bmnm_MonthlyManagementFeePercentageOfEquityFirst250Million Monthly Management Fee, Percentage of Equity, First 250 Million The percentage of equity of the first 250 million used to calculate the monthly management fee. bmnm_MonthlyManagementFeePercentageOfEquityBetween250And500Million Monthly Management Fee, Percentage of Equity, Between 250 and 500 Million Percentage of equity over 250 million and under 500 million used to calculate the monthly management fee. bmnm_MonthlyManagementFeePercentageOfEquityOver500Million Monthly Management Fee, Percentage of Equity, Over 500 Million Percentage of equity of over 500 million used to calculate the monthly management fee. bmnm_ManagementAgreementExtensionPeriod Management Agreement, Extension Period (Year) Period of extension of management agreement. Common Class A [Member] Gross amount offset bmnm_MonthlyManagementFeeCalculationMultiplierToPercentageOfEquity Monthly Management Fee, Calculation, Multiplier to Percentage of Equity The number multiplied the appropriate percentage of equity used to calculate the monthly management fee. Bimini Capital Trust II (“BCTII”) [Member] Represents Bimini Capital Trust II (“BCTII”). Junior Subordinated Debt Securities [Member] Represents junior subordinated debt securities. Bimini Capital Trust Junior Subordinated Note [Member] Represents Bimini Capital Trust Junior Subordinated Note. bmnm_ManagementAgreementTerminationFeeMultipliedByAverageManagementFee Management Agreement, Termination Fee, Multiplied by Average Management Fee The number to be multiplied by average management fee to calculate the termination fee under management agreement. Pass Through Certificate [Member] Represents pass through certificate. US Treasury Securities Interest Rate [Member] Represents US treasury securities interest rate. Income Tax Disclosure [Text Block] Accounting Standards Update and Change in Accounting Principle [Table] Income Tax, Policy [Policy Text Block] Related and Nonrelated Parties [Domain] bmnm_IntercompanyExpenses Intercompany expenses(1) Amount of intercompany expenses. Advisory services, other operating segments(1) bmnm_AdvisoryServicesOtherSegments Amount of revenue from advisory services from other segments. Asset Management [Member] Represents Asset Management. Investment Portfolio [Member] Represents Investment Portfolio. Related Party Transaction [Table] Related Party Transactions Disclosure [Text Block] The 2026 Repurchase Plan [Member] Relating to the 2026 Repurchase Plan. us-gaap_RelatedPartyTransactionRate Related Party Transaction, Rate Fair Value Hierarchy and NAV [Domain] Measurement Frequency [Domain] us-gaap_RepaymentsOfLongTermDebt Principal repayments on long-term debt Statement of Financial Position [Abstract] Other income (expense) us-gaap_NonoperatingIncomeExpense Other expense, net Repurchase agreement liabilities associated with these securities Fair value of securities pledged, including accrued interest receivable bmnm_PolicyTable Net weighted average borrowing rate Direct advisory services costs Other assets Directors' fees and liability insurance Repurchase Agreement, Counterparty [Table] Audit, legal and other professional fees us-gaap_RepurchaseAgreementCounterpartyAmountAtRisk Repurchase Agreement Counterparty, Amount at Risk Fair Value, Recurring [Member] us-gaap_IncreaseDecreaseInOtherOperatingAssets Other assets us-gaap_RepurchaseAgreementsInterestExpenseAmount Repurchase agreements Document Type Document Information [Line Items] Document Quarterly Report us-gaap_ConcentrationRiskPercentage1 Concentration Risk, Percentage Document Information [Table] Repurchase and Resale Agreements Policy [Policy Text Block] CME Term SOFR [Member] Represents CME Term SOFR. Entity Interactive Data Current Document Transition Report us-gaap_OperatingExpenses Operating expenses(3) Notes Payable to Banks [Member] Basic and Diluted (in shares) us-gaap_WeightedAverageNumberOfSharesOutstandingBasic Weighted average shares-basic and diluted (in shares) Unrealized gains (losses) on investments Unrealized losses (gains) on investments Derivative Instrument [Axis] Antidilutive Security, Excluded EPS Calculation [Table] Basic and Diluted (in dollars per share) Basic and diluted (in dollars per share) Earnings Per Share, Policy [Policy Text Block] Subsidiary of Common Parent [Member] Document Fiscal Period Focus Pledging Purpose [Axis] Customer [Domain] Document Fiscal Year Focus Pledging Purpose [Domain] Investment, Name [Domain] Restricted cash Restricted Cash and Cash Equivalent, Current Amendment Flag Common Stock [Member] us-gaap_IncreaseDecreaseInOtherOperatingLiabilities Other liabilities Document Period End Date Long-Lived Asset, Class [Domain] Legal Entity [Axis] Business Combination [Domain] Entity File Number Entity Tax Identification Number Business Combination [Axis] Gross amount of liabilities Entity [Domain] Entity Central Index Key Entity Registrant Name Entity Current Reporting Status Entity Incorporation, State or Country Code Current Fiscal Year End Date Entity Filer Category Entity Shell Company Entity Emerging Growth Company Entity Small Business Building and Building Improvements [Member] Derivative [Member] Restricted cash us-gaap_Cash Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Interest expense: us-gaap_InterestExpense Interest expense(2) us-gaap_Revenues Revenues Total revenues Revenues: us-gaap_BusinessCombinationConsiderationTransferred1 Business Combination, Consideration Transferred Entity Address, State or Province Entity Address, City or Town Accumulated deficit Entity Address, Address Line One City Area Code Local Phone Number Entity Address, Postal Zip Code Derivatives, Policy [Policy Text Block] Class of Stock [Axis] Variable Rate [Axis] Variable Rate [Domain] Related Party Transaction [Domain] Entity Common Stock, Shares Outstanding Related Party Transaction [Axis] Earnings Per Share [Text Block] us-gaap_InterestExpenseLongTermDebt Long-term debt Common shares outstanding at the balance sheet date (in shares) us-gaap_DerivativeCollateralRightToReclaimCash Cash posted as collateral bmnm_LongtermDebtMaturityAfterYearFour After 2030 (cumulative) Amount of long-term debt payable, sinking fund requirement, and other securities issued that are redeemable by holder at fixed or determinable price and date, maturing after fourth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). Weighted Average Shares Outstanding: Administrative and other expenses Common stock, par value (in dollars per share) Investment, Name [Axis] Other liabilities Basis of Accounting, Policy [Policy Text Block] Derivative Contract [Domain] Long-Lived Asset, Class [Axis] Assets us-gaap_Assets Total Assets Cash and Cash Equivalents, Policy [Policy Text Block] Cash and cash equivalents Repurchase Agreements [Member] Investments, fair value Orchid Island Capital, Inc. common stock, at fair value us-gaap_InvestmentOwnedBalanceShares Investment Owned, Balance, Shares (in shares) Customer [Axis] Depreciation Repurchase Agreements, Resale Agreements, Securities Borrowed, and Securities Loaned Disclosure [Text Block] Segment Reporting, Reconciling Item, Corporate Nonsegment [Member] Net amount us-gaap_DerivativeFairValueOfDerivativeLiabilityAmountOffsetAgainstCollateral Consolidation, Policy [Policy Text Block] Dividend income from Orchid Island Capital, Inc. common stock Investment Income, Dividend Interest and dividend income us-gaap_InvestmentIncomeInterestAndDividend Accrued interest on pledged securities Accrued interest receivable Interest income Interest expense Schedule of Long-Term Debt Instruments [Table Text Block] Gains (losses) on derivative instruments Repurchase agreements us-gaap_StockholdersEquity Total Stockholders’ Equity Balances Balances Management Service [Member] Orchid Island Capital, Inc. common stock us-gaap_FinancialInstrumentsOwnedPrincipalInvestmentsAtFairValue Stock, Class of Stock [Table] us-gaap_FinancialInstrumentsOwnedUSGovernmentAndAgencyObligationsAtFairValue Fair Value Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Domain] Schedule of Financial Instruments Owned and Pledged as Collateral [Table Text Block] Mortgage-backed securities Total mortgage-backed securities Schedule of Repurchase Agreements [Table Text Block] ecd_Rule10b51ArrTrmntdFlag Rule 10b5-1 Arrangement Terminated [Flag] ecd_Rule10b51ArrAdoptedFlag Rule 10b5-1 Arrangement Adopted [Flag] Advisory services, external customers Advisory services COMMITMENTS AND CONTINGENCIES (Note 9) Marketable Securities [Table Text Block]