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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.

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