Note 16 - Equity - Rollforward of Non-controlling Interests (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Balance	$ 52,006
Non-controlling interest share of income (loss)	1,961
Other comprehensive (loss)	(55)
Acquisition / (surrender) of additional units of consolidated subsidiary	(509)
Equity-based compensation	894
Shares withheld for employee taxes	(443)
Distributions to convertible non-controlling interest of Cohen & Company Inc.	(6,016)
Redemption of convertible non-controlling interest units	(1,883)	$ (954)
Non-convertible non-controlling interest contributions	2,666
Balance	48,621
Operating LLC [Member]
Balance	51,568
Non-controlling interest share of income (loss)	2,679
Other comprehensive (loss)	(55)
Acquisition / (surrender) of additional units of consolidated subsidiary	(509)
Equity-based compensation	894
Shares withheld for employee taxes	(443)
Distributions to convertible non-controlling interest of Cohen & Company Inc.	(6,016)
Redemption of convertible non-controlling interest units	(1,883)
Non-convertible non-controlling interest contributions	0
Balance	46,235
Columbus Circle II SPAC [Member]
Balance	0
Non-controlling interest share of income (loss)	(584)
Other comprehensive (loss)	0
Acquisition / (surrender) of additional units of consolidated subsidiary	0
Equity-based compensation	0
Shares withheld for employee taxes	0
Distributions to convertible non-controlling interest of Cohen & Company Inc.	0
Redemption of convertible non-controlling interest units	0
Non-convertible non-controlling interest contributions	2,666
Balance	2,082
Other Consolidated Subsidiaries [Member]
Balance	438
Non-controlling interest share of income (loss)	(134)
Other comprehensive (loss)	0
Acquisition / (surrender) of additional units of consolidated subsidiary	0
Equity-based compensation	0
Shares withheld for employee taxes	0
Distributions to convertible non-controlling interest of Cohen & Company Inc.	0
Redemption of convertible non-controlling interest units	0
Non-convertible non-controlling interest contributions	0
Balance	$ 304