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Mortgage Revenue Bonds - Schedule of Terms of MRBSs upon Redemption (Details)	3 Months Ended
	Mar. 31, 2023 USD ($) Unit	Mar. 31, 2024 USD ($)
Schedule Of Available For Sale Securities [Line Items]
Principal Outstanding at Date of Redemption	$ 18,315,580	$ 22,073,000
Mortgage Revenue Bonds [Member]
Schedule Of Available For Sale Securities [Line Items]
Principal Outstanding at Date of Redemption	8,493,040
Greens Property [Member]
Schedule Of Available For Sale Securities [Line Items]
Principal Outstanding at Date of Redemption	$ 850,000
Greens Property [Member] | Series A [Member] | Mortgage Revenue Bonds [Member] | Durham NC [Member]
Schedule Of Available For Sale Securities [Line Items]
Month Redeemed	February 2023
Units | Unit	168
Original Maturity Date	Oct. 01, 2047
Fixed Interest Rate	6.50%
Principal Outstanding at Date of Redemption	$ 7,579,000
Greens Property [Member] | Series B [Member] | Mortgage Revenue Bonds [Member] | Durham NC [Member]
Schedule Of Available For Sale Securities [Line Items]
Month Redeemed	February 2023
Units | Unit	168
Original Maturity Date	Oct. 01, 2047
Fixed Interest Rate	12.00%
Principal Outstanding at Date of Redemption	$ 914,040

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