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Loss Contingencies [Table] Statement of Stockholders' Equity [Abstract] Statement of Cash Flows [Abstract] Stockholders' Equity: Equity Components [Axis] cohn_DebtInstrumentTenorSpreadAdjustment Debt Instrument, Tenor Spread Adjustment The tenor spread adjustment related to the debt. SBA Loans [Member] Represents the SBA loans. Equity Component [Domain] Offsetting Liabilities [Table] Margin Loan Collateral [Member] Represents margin loan collateral. Senior Note 2020 & 2024 [Member] Represents senior notes for 2020 & 2024. AOCI Attributable to Parent [Member] Additional Paid-in Capital [Member] Retained Earnings [Member] Reclasses to (from) Amount reclasses to or from equity method investment. Schedule of Gain (Loss) on Securities [Table] Other SPAC Sponsor Entities [Member] Represents other SPAC sponsor entities. Financial Instruments Disclosure [Text Block] Cohen & Company [Member] Represents information related to Cohen & Company. 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Cohen & Company Capital Markets (CCM) [Member] Cohen & Company Capital Markets (CCM) Other Consolidated Subsidiaries [Member] Related to other consolidated subsidiaries. Schedule of Investment Banking and New Issue [Table Text Block] Tabular disclosure of investment banking and new issues. 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Shares Issued to Former SPAC Sponsor Entity [Member] Represents payment of shares to a former SPAC sponsor entity. In-kind Distribution to Non-convertible Controlling Interest [Member] Represents in-kind distribution to the non-convertible controlling interest. Deferred tax provision (benefit) Schedule of Accrued Compensation [Table Text Block] Tabular disclosure of accrued compensation. us-gaap_StockRedeemedOrCalledDuringPeriodValue Redemption of convertible non-controlling interest units Non-convertible Senior Notes 12.00% (2024 Senior Notes) [Member] Represents the Non-convertible Senior Notes 12.00%. Net income/(loss) us-gaap_NetIncomeLoss Net income attributable to Cohen & Company Inc. Net income (loss) attributable to Cohen & Company Inc. 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Crane Harbor Acquisition II [Member] Crane Harbor Acquisition II Revenue before gain (loss) on financial instruments cohn_RevenuesBeforeGainLossOnFinancialInstruments Amount, including tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value-added and excise. Columbus Capital Corp II [Member[ Columbus Capital Corp II cohn_ProceedsFromIssuanceOrSaleOfEquityGross Proceeds from Issuance or Sale of Equity, Gross The cash inflow from the issuance of common stock, preferred stock, treasury stock, stock options, and other types of equity. us-gaap_BusinessDevelopment Business development Cash revenue cohn_RevenueFromContractWithCustomerExcludingAssessedTaxCash Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise. Equity Agreement [Member] Represents information related to equity agreement. cohn_AggregateOfferingPrice Aggregate Offering Price Represents aggregate offering price. Northland Capital Markets [Member] Represents information related to Northland Capital Markets. Acquisition / (surrender) of additional units of consolidated subsidiary Amount of increase (decrease) in noncontrolling interest from a business combination (deconsolidation). Equity-based compensation cohn_NoncontrollingInterestIncreaseFromEquitybasedCompensation Amount of increase in noncontrolling interest from equity-based compensation. Redemption of convertible non-controlling interest units (in shares) Non-operating income (expense) us-gaap_DividendPayableDateToBePaidDayMonthAndYear Dividends Payable, Date to be Paid Schedule of Variable Interest Entities [Table Text Block] us-gaap_AllowanceForDoubtfulAccountsReceivableWriteOffs Accounts Receivable, Allowance for Credit Loss, Writeoff us-gaap_DividendsCommonStock Dividends/distributions to convertible non-controlling interest Columbus Circle Warrants [Member] Columbus Circle Warrants cohn_InvestmentOwnedSharesReceived Investment Owned, Shares Received (in shares) The number of shares received in the investment owned. cohn_OtherInvestmentSoldGainLossFairValue Other Investment Sold, Gain (Loss), Fair Value Loss (gain) on other investments, at fair value Represents fair value of gain (loss) for other investment. Variable Interest Entity, Primary Beneficiary [Member] cohn_InvestmentOwnedSharesReceivableValue Investment Owned, Shares Receivable, Value The value of shares receivable on the investment owned. Variable Interest Entity, Not Primary Beneficiary [Member] BRR Shares [Member] BRR Shares Variable Interest Entity [Table] cohn_IncreaseDecreaseInAcquisitionSurrenderOfAdditionalUnitsOfConsolidatedSubsidiaryNet Increase in Cohen & Company Inc. paid in capital for the acquisition / (surrender) of additional units in consolidated subsidiary, net Represents increase (decrease) in net acquisition (surrender) of additional units of consolidated subsidiary us-gaap_ProfessionalFees Professional Fees us-gaap_AssetsUnderManagementCarryingAmount Assets under Management, Carrying Amount Document Type Document Information [Line Items] Document Quarterly Report us-gaap_OperatingLeaseWeightedAverageRemainingLeaseTerm1 Operating Lease, Weighted Average Remaining Lease Term (Year) Document Information [Table] Entity Interactive Data Current Restricted units or shares (in shares) Additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of restricted units or shares. lternative investment us-gaap_AlternativeInvestment Document Transition Report Weighted average shares outstanding-diluted (in shares) Weighted average common shares outstanding - Diluted (in shares) cohn_NumberOfUnitsSold Number of Units Sold (in shares) Represents number of units sold. Weighted average common shares outstanding - Basic (in shares) Weighted average shares outstanding-basic (in shares) Derivative Instrument [Axis] Collaborative Arrangement and Arrangement Other than Collaborative [Table] Net income / (loss) as a percentage of revenue The net income (loss) presented as a percentage of revenue. Operating income / (loss) as a percentage of revenue Operating income (loss) presented as a percentage of revenue. Net income / (loss) attributable to Cohen & Company Inc. as a percentage of revenue The net income (loss) attributable to parent company as a percentage of revenue. srt_ExcessNetCapitalAt1500Percent Broker-Dealer, Excess Net Capital, 1500 Percent, Aggregate Indebtedness Standard Document Fiscal Period Focus us-gaap_DepositsWithClearingOrganizationsAndOthersSecurities Deposits with clearing agencies Equity-based compensation Equity-based compensation Document Fiscal Year Focus Investment, Name [Domain] Depreciation and amortization Depreciation and amortization Net unrealized gains (losses) - trading inventory Amendment Flag Common Stock [Member] Document Period End Date Net realized gains (losses) - trading inventory us-gaap_DebtSecuritiesTradingGainLoss Net gains and losses Legal Entity [Axis] us-gaap_InterestAndDividendIncomeOperating Interest income Derivative financial instruments, fair value, net us-gaap_DerivativeFairValueOfDerivativeNet Interest income-reverse repos Represents interest income from repurchase agreements. Entity File Number Entity Tax Identification Number Entity [Domain] Net trading Net trading Net trading Represents interest income (expense) including unrealized gains and losses. 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Summary of Consolidated Variable Interest Entities [Table Text Block] Tabular disclosure of the summary of consolidated investments and holdings in variable interest entities. Non-controlling Interest, Changes in Ownership Activity [Table Text Block] Tabular disclosure of the changes in ownership activity of non-controlling interests. Enterprise net income Net income Net income Scenario [Axis] Scenario [Domain] Forecast [Member] us-gaap_AccruedIncomeTaxes Accrued income tax cohn_DividendsDistributionsToNoncontrollingInterests Dividends/distributions to convertible non-controlling interest Dividends/distributions to convertible non-controlling interest Represents dividends, distributions to non-controlling interests. Investment, Name [Axis] Other Long-Term Investments [Member] Total Assets us-gaap_Assets Total assets Geographical [Domain] Geographical [Axis] us-gaap_RelatedPartyTransactionPurchasesFromRelatedParty Related Party Transaction, Purchases from Related Party us-gaap_DefinedContributionPlanEmployerDiscretionaryContributionAmount Defined Contribution Plan, Employer Discretionary Contribution Amount us-gaap_NotesReceivableGross Financing Receivable, before Allowance for Credit Loss Net income / (loss) per common share - Diluted (in dollars per share) us-gaap_DefinedContributionPlanEmployerMatchingContributionPercent Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay Total investments - trading Investments-trading Debt Securities, Trading, and Equity Securities, FV-NI [Table] Debt securities Equity Method Investments and Joint Ventures Disclosure [Text Block] Debt Securities, Trading, and Equity Securities, FV-NI [Table Text Block] Other receivables Other receivables Other Significant Noncash Transaction, Name [Domain] Other Significant Noncash Transaction [Axis] Repurchase Agreements, Resale Agreements, Securities Borrowed, and Securities Loaned Disclosure [Text Block] Accounts and Financing Receivables [Table] Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block] us-gaap_NoncontrollingInterestInVariableInterestEntity Non-controlling interest Issuance as equity-based compensation (in shares) Less: comprehensive income attributable to the non-controlling interest cohn_SecuritiesPurchasedUnderAgreementsToResellAverageRate Securities Purchased under Agreements to Resell, Average Rate Average rate on securities purchases under agreements to resell. us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest Comprehensive income Total Equity us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest Total equity Balance Balance Issuance of shares (in shares) us-gaap_PartnersCapitalAccountUnitsSaleOfUnits us-gaap_PartnersCapitalAccountUnitsRedeemed Redemption of convertible non-controlling interest units (in shares) Parent [Member] Noncontrolling Interest [Member] us-gaap_PaymentsOfDividendsMinorityInterest Non-convertible non-controlling interest distributions us-gaap_PaymentsOfDividendsCommonStock Cohen & Company Inc. dividends Stock, Class of Stock [Table] Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Table Text Block] ecd_Rule10b51ArrTrmntdFlag Rule 10b5-1 Arrangement Terminated [Flag] ecd_Rule10b51ArrAdoptedFlag Rule 10b5-1 Arrangement Adopted [Flag] Asset Management [Member] Commitments and contingencies (See note 20) Statistical Measurement [Axis] us-gaap_DividendsPayableDateDeclaredDayMonthAndYear Dividends Payable, Date Declared ecd_NonRule10b51ArrTrmntdFlag Non-Rule 10b5-1 Arrangement Terminated [Flag] ecd_NonRule10b51ArrAdoptedFlag Non-Rule 10b5-1 Arrangement Adopted [Flag] Trading Arrangements, by Individual [Table] Material Terms of Trading Arrangement [Text Block] Financial Instrument [Axis] Minimum [Member] Statistical Measurement [Domain] Over-Allotment Option [Member] Maximum [Member] Income (loss) from equity method affiliates us-gaap_IncomeLossFromEquityMethodInvestments Income (Loss) from Equity Method Investments (Income) loss from equity method affiliates Income (loss) from equity method affiliates Due to and from Broker-Dealers and Clearing Organizations Disclosure [Text Block] cohn_LesseeOperatingLeaseLiabilityToBePaidAfterYearFour Thereafter Amount of lessee's undiscounted obligation for lease payment for operating lease due 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). Non-controlling Interest of Operating LLC [Member] Represents non-controlling interest of Operating, LLC. Non-controlling Interest of Cohen & Co. [Member] Represents non-controlling interest of Cohen & Co. Counterparty Name [Axis] us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent Byline Bank [Member] Represents Byline Bank. CK Capital Value Fund [Member] Represent CK Capital Value Fund. cohn_DebtInstrumentMinimumInterestRate Debt Instrument, Minimum Interest Rate The minimum interest rate under the debt instrument. cohn_LineOfCreditFacilityMinimumRequestInReductionOfMaximumBorrowingCapacity Line of Credit Facility, Minimum Request in Reduction of Maximum Borrowing Capacity The minimum amount of reduction of maximum borrowing capacity that can be requested. Financial Instruments [Domain] cohn_LineOfCreditFacilityReductionInMaximumBorrowingCapacityIncrementsAfterMinimum Line of Credit Facility, Reduction in Maximum Borrowing Capacity, Increments After Minimum The amount of incremental requests that can be made to reduce maximum capacity after the minimum amount of reduction request has been made. cohn_DebtInstrumentCovenantMinimumTangibleNetWorth Debt Instrument, Covenant, Minimum Tangible Net Worth The minimum tangible net worth allowed under the covenant of the debt instrument. us-gaap_CommonStockDividendsPerShareDeclared Common Stock, Dividends, Per Share, Declared (in dollars per share) Counterparty Name [Domain] srt_MinimumNetCapitalRequired1 Broker-Dealer, Minimum Net Capital Required, Aggregate Indebtedness Standard Dividends [Axis] Loan Agreement [Member] Represents Loan Agreemen. Dividends [Domain] us-gaap_ContractualObligation Contractual Obligation CK Capital Value Fund Cooperatief U.A. [Member] Represents CK Capital Value Fund Cooperatief U.A. Award Type [Axis] Adjustments to reconcile net income to net cash provided by (used in) operating activities: 2022 Note Purchase Agreement [Member] Represents information related to the 2022 note purchase agreement. Consolidation Items [Axis] us-gaap_EquityMethodInvestmentRealizedGainLossOnDisposal Loss (gain) on disposal of interest in Vellar GP Equity-based compensation us-gaap_ShareBasedCompensation Subsequent Event [Member] Consolidation Items [Domain] us-gaap_DebtInstrumentUnamortizedDiscountPremiumNet Less unamortized discount Cohen Co Including Noncontrolling Interest [Member] The amount of net income (loss) attributed to Cohen Co. including non-controlling interest. Preferred stock, issued (in shares) Preferred Stock, Shares Issued, Total (in shares) Europe [Member] Preferred stock, outstanding (in shares) Preferred Stock, Shares Outstanding, Ending Balance (in shares) cohn_PaymentsForRedemptionOfConvertibleNoncontrollingInterestUnits Redemption of convertible non-controlling units The amount of cash outflow for redemption of convertible non-controlling interest units. Preferred stock, authorized (in shares) Preferred Stock, Shares Authorized (in shares) Variable Interest Entity Disclosure [Text Block] Condensed Cash Flow Statement [Table] Preferred stock, par value (in dollars per share) Preferred Stock, Par or Stated Value Per Share (in dollars per share) Investment, Identifier [Axis] FTAC Parnassus Sponsor [Member] Information related to the FTAC Parnassus Sponsor. cohn_OtherInvestmentSoldNotYetPurchasedGainLoss Other Investment Sold, Not yet Purchased, Gain (Loss) Loss (gain) on other investments, sold not yet purchased Represents realized and unrealized gain (loss) for other investment sold not yet purchased. New Accounting Pronouncements, Policy [Policy Text Block] us-gaap_VariableInterestDifferenceBetweenCarryingAmountAndMaximumExposure Maximum exposure Statement [Table] Investments / advances The outflow associated with the purchase of or advances to an equity method investments, which are investments in joint ventures and entities in which the entity has an equity ownership interest normally of 20 to 50 percent and exercises significant influence. Including noncash transfers. Investment in equity method affiliates Investments in equity method affiliates Equity Method Investments Balance Balance Non-controlling interest share of income (loss) Equity Securities [Member] us-gaap_EquityMethodInvestmentOwnershipPercentage Equity Method Investment, Ownership Percentage us-gaap_EquityMethodInvestmentQuotedMarketValue Equity Method Investment, Quoted Market Value Nature of Operations [Text Block] Long-Term Debt, Type [Axis] Product and Service [Domain] Product and Service [Axis] Ownership [Axis] Ownership [Domain] Consolidated Entities [Axis] Consolidated Entities [Domain] Dutch Real Estate Entities [Member] Represents information regarding Dutch Real Estate entities. us-gaap_VariableInterestEntityNumberOfEntitiesWithUnavailabilityOfInformation Variable Interest Entity, Unavailability of Information, Number of Entities Residential Mortgage-Backed Securities [Member] us-gaap_AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent Accounts payable and other liabilities us-gaap_AccountsPayableCurrentAndNoncurrent Accounts payable Assets Statement [Line Items] Private Placement [Member] srt_SecuritiesSoldUnderAgreementsToRepurchaseAverageRatePaid Securities Sold under Agreements to Repurchase, Average Rate Paid Accrued compensation Accrued compensation us-gaap_DividendsPayableCurrentAndNoncurrent Accrued dividends and distributions us-gaap_ProceedsFromIssuanceOrSaleOfEquity Proceeds from Issuance or Sale of Equity Fair Value of Financial Instruments, Policy [Policy Text Block] Other compensation us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1 Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) us-gaap_OtherAccruedLiabilitiesCurrentAndNoncurrent Accrued expense and other liabilities Proceeds from issuance of common stock us-gaap_InterestPayableCurrentAndNoncurrent Accrued interest payable us-gaap_FairValueOfSecuritiesReceivedAsCollateralThatCanBeResoldOrRepledged Fair Value of Securities Received as Collateral that Can be Resold or Repledged us-gaap_FairValueOfSecuritiesReceivedAsCollateralThatHaveBeenResoldOrRepledged Fair Value of Securities Received as Collateral that Have Been Resold or Repledged us-gaap_ProceedsFromMinorityShareholders Non-convertible non-controlling interest investment us-gaap_AccruedEmployeeBenefitsCurrent Accrued Employee Benefits, Current Receivables under resale agreements Securities Purchased under Agreements to Resell us-gaap_AccruedPayrollTaxesCurrent Payroll taxes payable Sales and returns of principal - other investments, at fair value Equity Derivatives Included in Investment Banking and New Issue [Member] Represents Equity Derivatives Included in Investment Banking and New Issue. Related Party [Member] Columbus Circle Capital Corp II [Member] Represents Columbus Circle Capital Corp II. Schedule of Related Party Transactions [Table Text Block] Equity Derivatives Included in Principal Transactions and Other Income Loss [Member] Represents Equity Derivatives Included in Principal Transactions and Other Income Loss. O 2026 Q1 Dividends [Member] Represents O 2026 Q1 Dividends. Distribution from equity method affiliate Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table] S 2026 Q1 Dividends [Member] Represents S 2026 Q1 Dividends. BZC Family B.V. [Member] Represents BZC Family B.V. cohn_FinancingReceivableConvertibleNumberOfEquityInstruments Financing Receivable, Convertible, Number of Equity Instruments (in shares) The number of equity instruments that the holder of the financing receivable would receive if the receivable was converted to equity. Investment Banking Underwriting Services [Member] Represents investment banking underwriting services. Accounts Payable, Other Liabilities and Debt Outstanding Total amount of accounts payable, other liabilities and debt outstanding as of the balance sheet date. cohn_FinancingReceivableConvertibleConversionPrice Financing Receivable, Convertible, Conversion Price (in dollars per share) The price per share of the conversion feature embedded in the convertible financing receivable. Columbus Circle SPAC II [Member] Represents Columbus Circle SPAC II. Byline Bank Credit Facility [Member] Represents information regarding the Byline Bank Credit Facility. cohn_NoncontrollingInterestSharebasedPaymentArrangementDecreaseForTaxWithholdingObligation Shares withheld for employee taxes Amount of decrease to equity for grantee's tax withholding obligation for award under share-based payment arrangement, attributable to noncontrolling interest. Private Placement Warrants [Member] Represents Private Placement Warrants. Class of Warrant or Right [Axis] Class A Ordinary Shares of Columbus Circle II [Member] Represents Class A Ordinary Shares of Columbus Circle II. Class of Warrant or Right [Domain] Warrants of Columbus Circle II [Member] Represents Warrants of Columbus Circle II. Margin payable Amount of money owes to a broker (or clearing firm) to meet margin requirements on leveraged positions. us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToNoncontrollingInterest Other comprehensive (loss) Long-Term Debt, Type [Domain] Equity Derivatives [Member] Represents equity derivatives. Remaining Non-Controlling Members [Member] Represents the remaining non-controlling members. Fair Value, Inputs, Level 2 [Member] Fair Value, Inputs, Level 3 [Member] Fair Value, Inputs, Level 1 [Member] cohn_IncreaseDecreaseInEquityMethodAffiliates Increase (Decrease) in Equity Method Affiliates Represents the increase (decrease) in equity method affiliates during the period. Other trading revenue Amount of trading revenue, classified as other, during the reporting period. Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Table Text Block] Furniture, equipment, and leasehold improvements, net Prepaid expenses Investment banking and new issue receivable New issue fee earned but not yet received by the entity. Cash collateral due from repo and/or reverse repo counterparties Amount of cash collateral due from counterparties. Deferred income taxes us-gaap_ProvisionForOtherCreditLosses Provision for Other Credit Losses Executive deferred compensation FTAC Emerald Sponsor [Member] Represents FTAC Emerald Sponsor. Fair Value Disclosures [Text Block] Gains / (losses) on CCM financial instruments received as non-cash consideration us-gaap_GainLossOnInvestments Gain (Loss) on Investments CREO JV [Member] Represents CREO JV. Secured Overnight Financing Rate (SOFR) [Member] Accrued interest and dividend receivable Revenue share receivable us-gaap_PaymentsToAcquireEquityMethodInvestments Investment in equity method affiliate Accumulated other comprehensive loss us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest Income (loss) before income taxes Income before income tax expense Alesco Capital Trust I Debt [Member] Related to Alesco Capital Trust I debt. Sunset Financial Statutory Trust I Debt [Member] Related to Sunset Financial Statutory Trust I debt. Additional paid-in capital JKD Investor [Member] Related to JKD Investor. us-gaap_AdjustmentForAmortization Amortization us-gaap_PaymentsToAcquirePropertyPlantAndEquipment Purchase of furniture, equipment, and leasehold improvements us-gaap_PaymentsToAcquireOtherInvestments Purchase of other investments, at fair value Columbus Circle 2 Sponsor Corp LLC [Member] Represents Columbus Circle 2 Sponsor Corp LLC. cohn_InvestmentOwnedRestrictionsBitcoinDollarVolumeWeightedAveragePrice Investment Owned, Restrictions, Bitcoin, Dollar Volume Weighted Average Price (in dollars per share) The dollar volume weighted average price for bitcoin as it applies to restrictions on investments owned. cohn_IndemnificationSharePrice Indemnification, Share Price (in dollars per share) The price per share for which an organization has agreed to provide indemnification. Class of Stock [Domain] Non-convertible Debt [Member] Represents non-convertible debt. Columbus Circle II SPAC [Member] Represents Columbus Circle II SPAC. IPO [Member] Cash Flow, Supplemental Disclosures [Text Block] Investment Banking and New Issue [Member] Represents investment banking and new issue. us-gaap_SummaryOfInvestmentsOtherThanInvestmentsInRelatedPartiesCarryingAmount SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties, Amount Public Companies and Other [Member] Public Companies and Other Non CCM [Member] Non CCM Increase (decrease) in trading securities sold, not yet purchased Increase (Decrease) in Financial Instruments Sold, Not yet Purchased cohn_NumberOfSharesIssuedInExchangeForUnits Number of Shares Issued in Exchange for Units (in shares) The number of shares issued in exchange for units. O 2026 Q2 Dividends [Member] O 2026 Q2 Dividends Segment Reporting, Reconciling Item, Excluding Corporate Nonsegment [Member] Hadron Energy Inc [Member] Hadron Energy Inc Operating Segments [Member] Payoneer [Member] Payoneer Namib Minerals [Member] Namib Minerals ProCap Financials Inc [Member] ProCap Financials Inc Bakkt Inc [Member] Bakkt Inc Segments [Domain] Critical Metals Corp [Member] Critical Metals Corp Avax One Technology [Member] Avax One Technology Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Geographical Area, Revenue and Long-Lived Asset [Table] USBC Inc [Member] USBC Inc Nakamoto Inc [Member] Nakamoto Inc OceanPal Inc [Member] OceanPal Inc cohn_EquityMethodInvestmentSharesReceivedFromServicesProvided Equity Method Investment, Shares Received from Services Provided (in shares) The number of shares received from services provided accounted for under the equity method of accounting. Income Statement [Abstract] us-gaap_NumberOfOperatingSegments Number of Operating Segments us-gaap_NumberOfReportableSegments Number of Reportable Segments Common Class A [Member] Income Tax Disclosure [Text Block] Restricted Stock [Member] us-gaap_ProceedsFromEquityMethodInvestmentDividendsOrDistributionsReturnOfCapital Distributions / repayments us-gaap_RelatedPartyTransactionAmountsOfTransaction Related Party Transaction, Amounts of Transaction Related and Nonrelated Parties [Domain] Related Party Transaction [Table] Related Party Transactions Disclosure [Text Block] Non-convertible Senior Notes 10.00% (2020 Senior Notes) [Member] Represents the Non-convertible Senior Notes 10.00%. us-gaap_IncreaseDecreaseInBrokerageReceivables Increase (Decrease) in Receivable from Broker-Dealer and Clearing Organization Fair Value Hierarchy and NAV [Domain] Measurement Frequency [Domain] Unfunded commitments Fair Value, Investments, Entities that Calculate Net Asset Value Per Share, Unfunded Commitments Statement of Financial Position [Abstract] us-gaap_ProceedsFromIncomeTaxRefunds Proceeds from Income Tax Refunds Receivables from brokers, dealers, and clearing agencies Receivables from brokers, dealers, and clearing agencies Receivables from brokers, dealers, and clearing agencies Other assets Other assets us-gaap_RepaymentsOfSecuredDebt Repayment of 2020 Note / 2024 Note Fair Value, Recurring [Member] us-gaap_PaymentsToMinorityShareholders Convertible non-controlling interest distributions us-gaap_IncreaseDecreaseInOtherOperatingAssets (Increase) decrease in other assets Operating expenses Daniel G. Cohen [Member] Represents information related to Daniel G. Cohen. CK Capital Partners B.V. [Member] Represents information related to CK Capital Partners B.V. Due From Due To Related Parties Disclosure [Text Block] Description of due from/due to related parties. Schedule Of Due From Or Due To Related Parties [Table Text Block] Schedule of due from or due to related parties. Employees & Other [Member] Represents information related to employees and other. Interest expense (income) cohn_InterestIncomeExpenseRelatedParty Represents related party interest income (expense). Income per common share-diluted: cohn_InvestmentOwnedClosingSharePrice Investment Owned, Closing Share Price (in dollars per share) Represents investment owned, closing share price. U.S. Insurance JV [Member] Represents information related to U.S. Insurance JV. Common stock, unvested or restricted share award (in shares) Total number of common shares of an entity that are reserved for unvested or restricted awards outstanding. us-gaap_IncreaseDecreaseInTradingSecurities (Increase) decrease in investments-trading Asset management cohn_RelatedPartyTransactionsAssetManagementFees Asset management fees income with related party. Principal transactions and other income Principal transactions include all gains, losses, and income (interest and dividend) from securities or loans classified as other investments, at fair value (including gains and losses on derivatives classified as other investments, at fair value) in the consolidated balance sheets. Other income includes foreign currency gains and losses, interest earned on cash and cash equivalents, and other miscellaneous income. Income per common share-basic: Operating expense (income) cohn_OperatingExpenseIncomeRelatedPartyTransactions Represents income related party transactions for operating expense. Avax One Technology Ltd. Other investments, at fair value Other Investments, Fair Value Disclosure Amount of investments, other than trading securities, measured at fair value. SPAC Fund [Member] Represents information related to SPAC Fund. AOI [Member] Represents information related to AOI. JKD Capital Partners I, LTD [Member] Represents information related JKD capital partners I,LTD. Antidilutive Security, Excluded EPS Calculation [Table] Net income / (loss) per common share - Basic (in dollars per share) DGC Trust [Member] Represents information related to DGC Trust. Effective Income Tax Rate Reconciliation [Table] Subscriptions, clearing, and execution Subscriptions, clearing, and execution The amount of expense for subscriptions, clearing and execution. Acquisition / (surrender) of additional units of consolidated subsidiary, net Minority Interest, Increase (Decrease) Related to Units of Consolidated Subsidiary Amount of increase (decrease) in noncontrolling interest from acquisition (surrender) of additional unites of consolidated subsidiary. us-gaap_IncreaseDecreaseInBrokerDealerRelatedReceivablesPayablesNet Change in receivables from / payables to brokers, dealers, and clearing agencies Business development, occupancy, equipment The amount of expense for business development, occupancy and equipment. Intangible assets us-gaap_IntangibleAssetsNetExcludingGoodwill Amortization of discount on debt cohn_MinorityInterestDecreaseDueToSaleOfInterest Sale of Interest in Vellar GP The amount of minority interest decrease due to sale of interest. Contingent Convertible Senior Notes [Member] Represents information related to contingent convertible senior notes. Other Events [Text Block] The entire disclosure for other events. us-gaap_SubleaseIncome Sublease Income Trading Activities [Text Block] The entire disclosure related to trading activities. Schedule of Net Trading [Table Text Block] The tabular disclosure for net trading activities. Goodwill us-gaap_Goodwill Goodwill Noncash revenue us-gaap_NonmonetaryTransactionGrossOperatingRevenueRecognized Equity Distribution Agreement [Member] Related to Equity Distribution Agreement. cohn_SaleOfStockCommissionPercent Sale of Stock, Commission, Percent The percent commission in sale of stock. Asset Management Segment [Member] Represents information related to asset management segment. Foreign currency translation adjustments, net of tax Principal Investing [Member] Represents information related to principle investing. cohn_ReceivablesFromUnsettledRegularWayTradesNet Unsettled regular way trades, net The amount of receivables from unsettled regular way trades. Capital Markets [Member] Represents information related to capital markets. Small Business Administration Loans [Member] Represents Small Business Administration loans. Other comprehensive (loss) Other comprehensive income / (loss), net of tax Other comprehensive income (loss) Foreign currency translation adjustments, tax Gain on sale of management contracts Gain on sale of management contracts Gain from sales of management contracts. Reclassification, Segmentation Basis Change [Member] us-gaap_InterestExpense Interest expense Interest expense, net Interest Expense, Debt Interest expense, net Columbus Circle Capital Corp I [Member] Columbus Circle Capital Corp I. Accumulated deficit cohn_UnitsNumberofWarrantsPerUnit Warrants Included in Unit, Amount (in shares) The number of warrants included in each unit. us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation Cash used to net share settle equity awards Equity Method Investment [Table] Corporate Bonds and Redeemable Preferred Stock [Member] Represents corporate bonds and redeemable preferred stock. Schedule of Other Investments at Fair Value [Table Text Block] Th tabular disclosure of other investments at fair value. Capitalized Contract Cost [Table] cohn_LineOfCreditFacilityMinimumAssetCapital Line of Credit Facility, Minimum Asset Capital The minimum asset capital required by the bank. Cohen Securities [Member] Cohen Securities. Class of Stock [Axis] us-gaap_InterestExpenseSecuritiesSoldUnderAgreementsToRepurchase Interest expense-repos Add / (deduct): Adjustment cohn_EarningsPerShareAdjustment Represents the income tax impact if the Operating LLC membership units had been converted at the beginning of the period, and the adjustment for the non-controlling interest amount to be consistent with the weighted average share calculation. Accounts payable and other liabilities Net Capital Under Securities and Exchange Commission Regulation Disclosure [Text Block] Disclosure of net capital under securities and exchange commission regulation. Unrestricted LLC Units exchangeable into Cohen & Company Inc. shares (in shares) Represents unrestricted units exchangeable into shares. cohn_RedeemableNoncontrollingInterestMembershipUnitsNotHeldShareRatio Redeemable Non-controlling Interest Membership Units Not Held Share Ratio Represents redeemable non-controlling interest membership units not held share ratio. cohn_RatioOfSharesToVote Ratio of Shares To Vote Represents ratio of shares to vote. TBA and Other Forward MBS [Member] Represents TBA and other forward MBS. us-gaap_InterestExpenseShortTermBorrowingsExcludingFederalFundsAndSecuritiesSoldUnderAgreementsToRepurchase Interest expense-margin payable Mr. Cohen [Member] Represents information related to Mr. Cohen. JVB [Member] Represents information related to JVB. Not Designated as Hedging Instrument [Member] Schedule Of Unrestricted Common Stock And Restricted Common Stock Activity [Table Text Block] Tabular disclosure of unrestricted common stock and restricted common stock activity. Derivative Instruments, Gain (Loss) [Table Text Block] Units Received Pursuant To Agreement [Table Text Block] Tabular disclosure of units received pursuant to agreement table. Vesting of shares (in shares) Represents the number of shares from equity based awards that vested during the period. cohn_UnitsIssuedDuringPeriodNumberOfUnits Units Issued During Period, Number of Units (in shares) The number of units issued during the period. cohn_IncreaseDecreaseInOtherInvestments Increase (Decrease) in Other Investments Represents the amount of increase (decrease) in other investments, at fair value. Common stock, par value (in dollars per share) Common Stock, Par or Stated Value Per Share (in dollars per share) Class A Ordinary Share [Member] Class A ordinary shares. cohn_UnitsNumberOfSharesPerUnit Units, Number of Shares per Unit (in shares) Number of shares per unit. Gestational Repo Business [Member] Represents the gestation repo business. cohn_ChangesfromNetIncomeAttributableToParentAndTransfersToFromNoncontrollingInterest Changes from net income attributable to Cohen & Company Inc. and transfers (to) from the non-controlling interest Represents changes from net income attributable to parent and transfers to (from) noncontrolling interest. cohn_InvestmentsOwnedSharesPurchased Investments Owned, Shares Purchased (in shares) The shares purchased. Overnight and Continuous [Member] Represents overnight and continuous. cohn_UnitsIssuedDuringPeriodValueOfUnits Units, Issued During Period, Value of Units The value of the units issued during the period. Derivative Contract [Domain] cohn_InvestmentsOwnedSharesPurchasedValue Investments Owned, Shares Purchased, Value The value of the investment shares purchased. Warrants [Member] Warrants. cohn_UnitsIssuedPricePerUnit Units, Issued, Price Per Unit (in dollars per share) Units issued, price per unit. Sale of Stock [Domain] Miscellaneous other receivables cohn_OtherMiscellaneousReceivables Carrying amount as of the balance sheet date of receivables not otherwise disclosed. cohn_InterestPayableSecuritiesSoldNotYetPurchased Accrued interest on securities sold, not yet purchased Carrying amount as of the balance sheet date of interest owed but not paid on securities sold not yet purchased. Schedule Of Interest Expense By Debt Instrument [Table Text Block] Tabular disclosure of interest expense by debt instrument. cohn_NotesReceivableMaximumAdditionalAmount Notes Receivable, Maximum Additional Amount The maximum additional amount of notes receivable. Other Receivables, Other Assets, Accounts Payable and Other Liabilities [Text Block] The entire disclosure for other receivables, other assets, accounts payable and other liabilities. Asset management receivable Carrying amount as of the balance sheet date of asset management fees earned but not received. Cash and cash equivalents Junior Subordinated Notes [Member] Represents information related to junior subordinated notes. us-gaap_InvestmentOwnedBalanceShares Investment Owned, Balance, Shares (in shares) Alesco Capital Trust I [Member] Represents information related to Alesco Capital Trust I. Sunset Financial Statutory Trust I [Member] Represents information related to Sunset Financial Statutory Trust I. Non-convertible Senior Notes 12.00% (2020 Senior Notes) [Member] Represents 12% non-convertible senior notes (2020 senior notes). Non-convertible Senior Notes [Member] Represents information related to non-convertible senior notes. Security Sold Short [Table Text Block] Equity Method Investments [Table Text Block] Credit Facility [Member] Represents information related to credit facility. us-gaap_AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation Shares withheld for employee taxes Investment Type [Axis] us-gaap_InvestmentOwnedBalancePrincipalAmount Investment Owned, Balance, Principal Amount cohn_JuniorSubordinatedDebentureOwedToUnconsolidatedSubsidiaryTrustNetOfOwnershipInterestInTrust Junior Subordinated Debenture Owed To Unconsolidated Subsidiary Trust Net Of Ownership Interest In Trust Represents information related to junior subordinated debenture owned to unconsolidated subsidiary trust net of ownership interest in trust. us-gaap_InterestPaidNet Interest Paid, Excluding Capitalized Interest, Operating Activity cohn_FairValueOfCommonSecuritiesVariableInterestEntitiesTrusts Fair Value of Common Securities Variable Interest Entities Trusts Represents fair value of common securities variable interest trusts. cohn_YieldToMaturities Yield To Maturities Represents information related to yield to maturities. Principal transactions and other income cohn_PrincipalTransactionsAndOtherIncomeRelatedParty Principal transactions include all gains, losses, and income (interest and dividend) from securities or loans classified as other investments, at fair value (including gains and losses on derivatives classified as other investments, at fair value) in the consolidated balance sheets. Other income includes foreign currency gains and losses, interest earned on cash and cash equivalents, and other miscellaneous income. Securities sold under agreements to repurchase Securities Sold under Agreements to Repurchase Schedule of Due to (from) Broker-Dealer and Clearing Organization [Table Text Block] Redemption of Units [Member] Represents redemption of units. Equity allocable to the controlling interest us-gaap_StockholdersEquity Total stockholders' equity Municipal Bonds [Member] cohn_NumberOfRedeemedLlcUnits Number of Redeemed LLC Units Represents number of redeemed LLC unit. Columbus Circle SPAC [Member] Represents information pertaining to Columbus Circle SPAC. Right-of-use asset - operating leases us-gaap_FinancialInstrumentsOwnedAtFairValue Financial Instruments, Owned, at Fair Value cohn_AggregatePayableForRedeemedUnits Aggregate Payable for Redeemed Units Represents aggregate payable for redeemed units. Executive Chairman [Member] Represents Executive Chairman. Revenue Revenues, total Revenue from Contract with Customer, Excluding Assessed Tax Excluding NAV [Member] Excluding NAV cohn_RedeemedLlcUnitsPricePerUnit Redeemed LLC Units, Price Per Unit (in dollars per share) Represents price per unit for redeemed LLC units. Restricted LLC Units [Member] Represents restricted LLC units. SPAC III Sponsor Entities [Member] SPAC III Sponsor Entities cohn_NumberOfSpacs Number of SPACs The number of SPACs. cohn_NumberOfSpacsWithSignedBusinessCombinationAgreements Number of SPACs with Signed Business Combination Agreements The number of SPACs with signed business combination agreements.