Represents aggregate offering price.

No definition available.

Name:	cohn_AggregateOfferingPrice
Namespace Prefix:	cohn_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Represents number of units sold.

+ References

No definition available.

+ Details

Name:	cohn_NumberOfUnitsSold
Namespace Prefix:	cohn_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

The cash inflow from the issuance of common stock, preferred stock, treasury stock, stock options, and other types of equity.

+ References

No definition available.

+ Details

Name:	cohn_ProceedsFromIssuanceOrSaleOfEquityGross
Namespace Prefix:	cohn_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The percent commission in sale of stock.

+ References

No definition available.

+ Details

Name:	cohn_SaleOfStockCommissionPercent
Namespace Prefix:	cohn_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

The maximum share value permitted by the SEC for sale of stock.

+ References

No definition available.

+ Details

Name:	cohn_SaleOfStockMaximumSharesPermittedBySEC
Namespace Prefix:	cohn_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	instant

- Definition

Units issued, price per unit.

+ References

No definition available.

+ Details

Name:	cohn_UnitsIssuedPricePerUnit
Namespace Prefix:	cohn_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	instant

- Definition

Number of shares per unit.

+ References

No definition available.

+ Details

Name:	cohn_UnitsNumberOfSharesPerUnit
Namespace Prefix:	cohn_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

The number of warrants included in each unit.

+ References

No definition available.

+ Details

Name:	cohn_UnitsNumberofWarrantsPerUnit
Namespace Prefix:	cohn_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

Exercise price per share or per unit of warrants or rights outstanding.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 235
-SubTopic 10
-Name Accounting Standards Codification
-Section S50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480738/235-10-S50-1

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 235
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08(h)(4))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480678/235-10-S99-1

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481112/505-10-50-3

+ Details

Name:	us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	instant

- Definition

Number of securities into which each warrant or right may be converted. For example, but not limited to, each warrant may be converted into two shares.

+ References

No definition available.

+ Details

Name:	us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByEachWarrantOrRight
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

Face amount or stated value per share of common stock.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(29))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

+ Details

Name:	us-gaap_CommonStockParOrStatedValuePerShare
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	instant

- Definition

The difference between the price paid by the public and the contract price less the related expenses. A broker-dealer may underwrite a security offering by contracting to buy the issue either at a fixed price or a price based on selling the offering on a best-effort basis.

+ References

No definition available.

+ Details

Name:	us-gaap_UnderwritingIncomeLoss
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Details

Name:	us-gaap_SubsidiarySaleOfStockAxis=cohn_EquityDistributionAgreementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_CounterpartyNameAxis=cohn_NorthlandCapitalMarketsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_SubsidiarySaleOfStockAxis=cohn_ColumbusCircleCircleIiUnitSaleMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	dei_LegalEntityAxis=cohn_ColumbusCapitalCorpIiMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ClassOfWarrantOrRightAxis=cohn_WarrantsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementClassOfStockAxis=us-gaap_CommonClassAMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_SubsidiarySaleOfStockAxis=us-gaap_OverAllotmentOptionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_SubsidiarySaleOfStockAxis=us-gaap_PrivatePlacementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_CounterpartyNameAxis=cohn_CohenCompanyCapitalMarketsCcmMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Note 33 - Subsequent Events (Details Textual) - USD ($) $ / shares in Units, $ in Thousands	Feb. 12, 2026	Feb. 20, 2026	Dec. 31, 2025	Dec. 31, 2024	Oct. 05, 2023
Common Stock, Par or Stated Value Per Share (in dollars per share)			$ 0.01	$ 0.01
Equity Distribution Agreement [Member]
Sale of Stock, Maximum Shares Permitted by SEC					$ 4,712
Sale of Stock, Commission, Percent					2.50%
Subsequent Event [Member] \| Equity Distribution Agreement [Member]
Sale of Stock, Commission, Percent		2.50%
Subsequent Event [Member] \| Equity Distribution Agreement [Member] \| Northland Capital Markets [Member]
Aggregate Offering Price		$ 75,000
Subsequent Event [Member] \| Equity Distribution Agreement [Member] \| Northland Capital Markets [Member] \| Maximum [Member]
Sale of Stock, Maximum Shares Permitted by SEC		$ 13,094
Subsequent Event [Member] \| Columbus Circle Circle II Unit Sale [Member] \| Columbus Capital Corp II [Member[
Number of Units Sold (in shares)	23,000,000
Units, Issued, Price Per Unit (in dollars per share)	$ 10
Proceeds from Issuance or Sale of Equity, Gross	$ 230,000
Subsequent Event [Member] \| Columbus Circle Circle II Unit Sale [Member] \| Columbus Capital Corp II [Member[ \| Warrants [Member]
Units, Number of Warrants Per Unit (in shares)	0.33
Class of Warrant or Right, Number of Securities Called by Each Warrant or Right (in shares)	1
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)	$ 11.5
Subsequent Event [Member] \| Columbus Circle Circle II Unit Sale [Member] \| Columbus Capital Corp II [Member[ \| Common Class A [Member]
Common Stock, Par or Stated Value Per Share (in dollars per share)	$ 0.0001
Units, Number of Shares per Unit (in shares)	1
Subsequent Event [Member] \| Over-Allotment Option [Member] \| Columbus Capital Corp II [Member[
Number of Units Sold (in shares)	3,000,000
Subsequent Event [Member] \| Private Placement [Member] \| Columbus Capital Corp II [Member[
Number of Units Sold (in shares)	265,000
Units, Issued, Price Per Unit (in dollars per share)	$ 10
Proceeds from Issuance or Sale of Equity, Gross	$ 2,650
Subsequent Event [Member] \| Private Placement [Member] \| Cohen & Company Capital Markets (CCM) [Member] \| Columbus Capital Corp II [Member[
Number of Units Sold (in shares)	360,000
Underwriting Income (Loss)	$ 3,600
Subsequent Event [Member] \| Private Placement [Member] \| Cohen & Company Capital Markets (CCM) [Member] \| Columbus Capital Corp II [Member[ \| Warrants [Member]
Units, Number of Warrants Per Unit (in shares)	0.33
Subsequent Event [Member] \| Private Placement [Member] \| Cohen & Company Capital Markets (CCM) [Member] \| Columbus Capital Corp II [Member[ \| Common Class A [Member]
Units, Number of Shares per Unit (in shares)	1