Investments - Allowance for Credit Loss (Details) - USD ($)	3 Months Ended	12 Months Ended
	Mar. 31, 2026	Dec. 31, 2025
Investments [Abstract]
Beginning balance	$ 385,000	$ 480,000
Provision for change in allowance	(20,000)	(95,000)
Ending balance	365,000	385,000
Mortgage Loans [Member]
Investments [Abstract]
Beginning balance	220,000	235,000
Provision for change in allowance	(10,000)	(15,000)
Ending balance	210,000	220,000
Notes Receivable [Member]
Investments [Abstract]
Beginning balance	135,000	195,000
Provision for change in allowance	(5,000)	(60,000)
Ending balance	130,000	135,000
Unfunded Loan Commitments [Member]
Investments [Abstract]
Beginning balance	30,000	50,000
Provision for change in allowance	(5,000)	(20,000)
Ending balance	$ 25,000	$ 30,000