XML 105 R94.htm IDEA: XBRL DOCUMENT v3.24.2.u1

Note 20 - Earnings (Loss) Per Common Share (Details Textual)	6 Months Ended
	Jun. 30, 2024
Redeemable Non-controlling Interest Membership Units Not Held Share Ratio	10

X

- Definition

Represents redeemable non-controlling interest membership units not held share ratio.

+ References

No definition available.

+ Details

Name:	cohn_RedeemableNoncontrollingInterestMembershipUnitsNotHeldShareRatio
Namespace Prefix:	cohn_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	duration