Mortgage Revenue Bonds - Schedule of MRB Redeemed (Details) - Mortgage Revenue Bonds [Member]		3 Months Ended
		Mar. 31, 2023 USD ($) Unit	Mar. 31, 2022 USD ($) Unit	Jan. 31, 2022 USD ($)
Schedule Of Available For Sale Securities [Line Items]
Principal Outstanding at Date of Redemption		$ 8,493,040	$ 17,003,840	$ 61,055,000
Ohio Properties [Member] | Series A [Member] | Crescent Village, Willow Bend and Postwoods [Member]
Schedule Of Available For Sale Securities [Line Items]
Month Redeemed	[1]		March
Units | Unit	[1]		362
Original Maturity Date	[1]		Jun. 01, 2050
Interest Rate	[1]		7.00%
Principal Outstanding at Date of Redemption	[1]		$ 13,544,000
Ohio Properties [Member] | Series B [Member] | Crescent Village, Willow Bend and Postwoods [Member]
Schedule Of Available For Sale Securities [Line Items]
Month Redeemed	[1]		March
Units | Unit	[1]		362
Original Maturity Date	[1]		Jun. 01, 2050
Interest Rate	[1]		10.00%
Principal Outstanding at Date of Redemption	[1]		$ 3,459,840
Greens Property [Member] | Series A [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
Interest Rate		6.50%
Principal Outstanding at Date of Redemption		$ 7,579,000
Greens Property [Member] | Series B [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
Interest Rate		12.00%
Principal Outstanding at Date of Redemption		$ 914,040

[1] The Ohio Properties consist of Crescent Village, located in Cincinnati, Ohio, Willow Bend, located in Columbus (Hilliard), Ohio and Postwoods, located in Reynoldsburg, Ohio.