Note 11 - Investments in Equity Method Affiliates - Investments in Equity Method Affiliates (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2026	Mar. 31, 2025	Dec. 31, 2025	Dec. 31, 2024
Balance	$ 6,661	$ 23,430	$ 23,430
Investments / advances	6,475		3,467
Distributions / repayments	0		(1,587)
Reclasses to (from)	(1,351)		(1,886)
Income (Loss) from Equity Method Investments	(527)	2,418	(16,763)
Balance	11,258		6,661
Total Assets	684,137		700,585
Liabilities	583,991		597,499
Equity allocable to the controlling interest	51,525		51,080
Noncontrolling interest	48,621		52,006
Total Equity	100,146	85,660	103,086	$ 90,283
Total Liabilities & Equity	684,137		700,585
Net income/(loss)	1,492	329
Dutch Real Estate Entities [Member]
Balance	5,739	5,105	5,105
Investments / advances	2,809		0
Distributions / repayments	0		0
Reclasses to (from)	0		0
Income (Loss) from Equity Method Investments	(283)		634
Balance	8,265		5,739
Columbus Circle II SPAC [Member]
Balance	0
Investments / advances	3,666
Distributions / repayments	0
Reclasses to (from)	0
Income (Loss) from Equity Method Investments	(698)
Balance	2,968		0
Other SPAC Sponsor Entities [Member]
Balance	922	18,325	18,325
Investments / advances			0
Distributions / repayments			(1,587)
Reclasses to (from)	(1,351)		(1,886)
Income (Loss) from Equity Method Investments	454		(13,930)
Balance	25		922
Columbus Circle SPAC [Member]
Balance	0	0	0
Investments / advances			3,467
Distributions / repayments			0
Reclasses to (from)			0
Income (Loss) from Equity Method Investments			(3,467)
Balance			0
Equity Method Investment, Nonconsolidated Investee or Group of Investees [Member]
Total Assets	672,533		494,662
Liabilities	133,618		194,512
Equity allocable to the controlling interest	538,790		300,025
Noncontrolling interest	125		125
Total Equity	538,915		300,150
Total Liabilities & Equity	672,533		$ 494,662
Net income/(loss)	884	3,089
Net income/(loss) attributable to the investee	$ 884	$ 3,089