Mortgage Revenue Bonds - Schedule of MRBs Redeemed (Details) - Mortgage Revenue Bonds [Member]		12 Months Ended
		Dec. 31, 2022 USD ($) Unit	Dec. 31, 2021 USD ($) Unit	Jan. 31, 2022 USD ($)
Schedule Of Available For Sale Securities [Line Items]
Principal Outstanding at Date of Redemption		$ 37,795,376	$ 43,830,074	$ 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
Bridle Ridge [Member] | Greer, SC [Member]
Schedule Of Available For Sale Securities [Line Items]
Month Redeemed		May
Units | Unit		152
Original Maturity Date		Jan. 01, 2043
Interest Rate		6.00%
Principal Outstanding at Date of Redemption		$ 7,100,000
Cross Creek [Member] | Beaufort, SC [Member]
Schedule Of Available For Sale Securities [Line Items]
Month Redeemed		September
Units | Unit		144
Original Maturity Date		Mar. 01, 2049
Interest Rate		6.15%
Principal Outstanding at Date of Redemption		$ 7,666,752
Gateway Village [Member] | Durham, NC [Member]
Schedule Of Available For Sale Securities [Line Items]
Month Redeemed		October
Units | Unit		64
Original Maturity Date		Apr. 01, 2032
Interest Rate		6.10%
Principal Outstanding at Date of Redemption		$ 2,589,163
Lynnhaven Apartments [Member] | Durham, NC [Member]
Schedule Of Available For Sale Securities [Line Items]
Month Redeemed		October
Units | Unit		75
Original Maturity Date		Apr. 01, 2032
Interest Rate		6.10%
Principal Outstanding at Date of Redemption		$ 3,435,621
Arby Road Apartments [Member] | Series A [Member] | Las Vegas, NV [Member]
Schedule Of Available For Sale Securities [Line Items]
Month Redeemed	[2]		March
Units | Unit	[2]		180
Original Maturity Date	[2]		Oct. 01, 2027
Interest Rate	[2]		5.35%
Principal Outstanding at Date of Redemption	[2]		$ 1,600,000
Arby Road Apartments [Member] | Series A [Member] | Las Vegas, NV [Member]
Schedule Of Available For Sale Securities [Line Items]
Month Redeemed	[2]		March
Units | Unit	[2]		180
Original Maturity Date	[2]		Apr. 01, 2041
Interest Rate	[2]		5.50%
Principal Outstanding at Date of Redemption	[2]		$ 5,785,000
Rosewood Townhomes [Member] | Series A [Member] | Goose Creek, SC [Member]
Schedule Of Available For Sale Securities [Line Items]
Month Redeemed			July
Units | Unit			100
Original Maturity Date			Jul. 01, 2055
Interest Rate			5.75%
Principal Outstanding at Date of Redemption			$ 9,259,206
Rosewood Townhomes [Member] | Series B [Member] | Goose Creek, SC [Member]
Schedule Of Available For Sale Securities [Line Items]
Month Redeemed			July
Units | Unit			100
Original Maturity Date			Aug. 01, 2055
Interest Rate			12.00%
Principal Outstanding at Date of Redemption			$ 469,781
South Pointe Apartments [Member] | Series A [Member] | Hanahan, SC [Member]
Schedule Of Available For Sale Securities [Line Items]
Month Redeemed			July
Units | Unit			256
Original Maturity Date			Jul. 01, 2055
Interest Rate			5.75%
Principal Outstanding at Date of Redemption			$ 21,551,600
South Pointe Apartments [Member] | Series B [Member] | Hanahan, SC [Member]
Schedule Of Available For Sale Securities [Line Items]
Month Redeemed			July
Units | Unit			256
Original Maturity Date			Aug. 01, 2055
Interest Rate			12.00%
Principal Outstanding at Date of Redemption			$ 1,099,487
Woodlynn Village [Member] | Maplewood Minnesota [Member]
Schedule Of Available For Sale Securities [Line Items]
Month Redeemed			November
Units | Unit			59
Original Maturity Date			Nov. 01, 2042
Interest Rate			6.00%
Principal Outstanding at Date of Redemption			$ 4,065,000

[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.

[2] Both MRBs are part of the same series but had different interest rates and maturity dates.