Investments in Real Estate-Related Securities (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2024	Dec. 31, 2023
Debt Instrument [Line Items]
Principal Balance	$ 32,956	$ 25,202
Unamortized Premium (Discount)	(1,247)	(1,160)
Amortized Cost / Cost	35,775	30,183
Unrealized Gain (Loss), Net	0	(2,153)
Fair Value	35,775	28,030
Non-agency CMBS
Debt Instrument [Line Items]
Principal Balance	32,956	25,202
Unamortized Premium (Discount)	(1,247)	(1,160)
Amortized Cost / Cost	31,710	24,042
Unrealized Gain (Loss), Net	(251)	(741)
Fair Value	$ 31,459	$ 23,301
Period-end Weighted Average Yield	7.60%	7.26%
Preferred stock of REITs
Debt Instrument [Line Items]
Amortized Cost / Cost		$ 2,107
Unrealized Gain (Loss), Net		(171)
Fair Value		$ 1,936
Period-end Weighted Average Yield		6.71%
Common stock of REITs
Debt Instrument [Line Items]
Amortized Cost / Cost	$ 4,065	$ 4,034
Unrealized Gain (Loss), Net	251	(1,241)
Fair Value	$ 4,316	$ 2,793
Period-end Weighted Average Yield	5.28%	5.51%