Note 17 - Equity - Rollforward of Non-controlling Interests (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Balance	$ 50,115
Non-controlling interest share of income (loss)	21,483
Other comprehensive (loss)	(36)
Acquisition / (surrender) of additional units of consolidated subsidiary	(437)
Equity-based compensation	823
Shares withheld for employee taxes	(133)
Distributions to convertible non-controlling interest of Cohen & Company Inc.	(1,586)
Redemption of convertible non-controlling interest units	(659)	$ (834)
Balance	69,570
Operating LLC [Member]
Balance	40,509
Non-controlling interest share of income (loss)	5,213
Other comprehensive (loss)	(36)
Acquisition / (surrender) of additional units of consolidated subsidiary	(437)
Equity-based compensation	823
Shares withheld for employee taxes	(133)
Distributions to convertible non-controlling interest of Cohen & Company Inc.	(1,586)
Redemption of convertible non-controlling interest units	(659)
Balance	43,694
Insurance SPAC [Member]
Balance	9,606
Non-controlling interest share of income (loss)	16,270
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
Balance	$ 25,876