Note 24 - Related Party Transactions - Routine Transactions Recognized in the Statements of Operations (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Asset management	$ 501	$ 603
Principal transactions and other income	241	495
Income (loss) from equity method affiliates	29,045	(395)
Income (loss) from equity method affiliates	29,045	(395)
Operating expense (income)	132	149
Interest expense (income)	486	318
CREO JV [Member]
Asset management	184	0
Principal transactions and other income	159	349
SPAC Fund [Member]
Asset management	0	359
Principal transactions and other income	0	28
U.S. Insurance JV [Member]
Asset management	317	244
Principal transactions and other income	77	103
Other SPAC Sponsor Entities [Member]
Asset management	5	15
Income (loss) from equity method affiliates	29,161	(537)
Income (loss) from equity method affiliates	29,161	(537)
Dutch Real Estate Entities [Member]
Income (loss) from equity method affiliates	(116)	142
Income (loss) from equity method affiliates	(116)	142
Equity Method Affiliates [Member]
Income (loss) from equity method affiliates	29,045	(395)
Income (loss) from equity method affiliates	29,045	(395)
Duane Morris [Member]
Operating expense (income)	158	175
Cohen Circle LLC [Member]
Operating expense (income)	(26)	(26)
JKD Investor [Member]
Interest expense (income)	$ 486	$ 318