Note 3 - Loans Held for Investment, Net - Loan and Preferred Equity Portfolio Activity (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2022	Mar. 31, 2021
Balance	[1]	$ 1,088,881
Originations		99,708	$ 25,876
PIK distribution reinvested in Preferred Units		168	0
Loan loss provision		(151)	(124)
Balance	[1]	1,056,155
Loans Receivable, Held for Investment [Member]
Balance		1,088,881	1,045,891
Originations		99,708	25,876
Proceeds from principal repayments		(124,633)	(834)
Amortization of loan premium, net (1)	[2]	(7,818)	(1,759)
Realized losses		0	(65)
Balance		$ 1,056,155	$ 1,068,985

[1] Carrying value includes the outstanding face amount plus unamortized purchase premiums/discounts and any allowance for loan losses.

[2] Includes net amortization of loan purchase premiums.