Governmental Issuer Loans - Summary of Partnership's GIL Investments (Details)		3 Months Ended			12 Months Ended
		Mar. 31, 2022 USD ($) Unit		Mar. 31, 2021	Dec. 31, 2021 USD ($) Unit
SIFMA [Member]
Governmental Issuer Loans [Line Items]
Variable Interest Rate					2.25%
Governmental Issuer Loans [Member] | TOB Trust [Member]
Governmental Issuer Loans [Line Items]
Amortized Cost		$ 201,649,588			$ 184,767,450
Governmental Issuer Loans [Member] | Scharbauer Flats Apartments [Member] | TOB Trust [Member] | Midland, TX [Member]
Governmental Issuer Loans [Line Items]
Month Acquired		June 2020	[1]		June 2020	[2]
Units | Unit		300	[1]		300	[2]
Original Maturity Date		Jan. 01, 2023	[1],[3]		Jan. 01, 2023	[2],[4]
Current Interest Rate		3.61%	[1]		3.20%	[2]
Amortized Cost		$ 40,000,000	[1]		$ 40,000,000	[2]
Governmental Issuer Loans [Member] | Scharbauer Flats Apartments [Member] | TOB Trust [Member] | SIFMA [Member] | Midland, TX [Member]
Governmental Issuer Loans [Line Items]
Variable Interest Rate		3.10%	[1]		3.10%	[2]
Governmental Issuer Loans [Member] | Oasis at Twin Lakes [Member] | TOB Trust [Member] | Roseville, MN [Member]
Governmental Issuer Loans [Line Items]
Month Acquired		July 2020	[1]		July 2020	[2]
Units | Unit		228	[1]		228	[2]
Original Maturity Date		Aug. 01, 2023	[1],[3]		Aug. 01, 2023	[2],[4]
Current Interest Rate		2.76%	[1]		3.75%	[2]
Amortized Cost		$ 34,000,000	[1]		$ 34,000,000	[2]
Governmental Issuer Loans [Member] | Oasis at Twin Lakes [Member] | TOB Trust [Member] | SIFMA [Member] | Roseville, MN [Member]
Governmental Issuer Loans [Line Items]
Variable Interest Rate		2.25%	[1]		3.25%	[2],[5],[6]
Governmental Issuer Loans [Member] | Centennial Crossings [Member] | TOB Trust [Member] | Centennial, CO [Member]
Governmental Issuer Loans [Line Items]
Month Acquired		August 2020	[1]		August 2020	[2]
Units | Unit		209	[1]		209	[2]
Original Maturity Date		Sep. 01, 2023	[1],[3]		Sep. 01, 2023	[2],[4]
Current Interest Rate		3.26%	[1]		3.25%	[2]
Amortized Cost		$ 33,080,000	[1]		$ 33,080,000	[2]
Governmental Issuer Loans [Member] | Centennial Crossings [Member] | TOB Trust [Member] | SIFMA [Member] | Centennial, CO [Member]
Governmental Issuer Loans [Line Items]
Variable Interest Rate	[5]	2.75%	[1]		2.75%	[2]
Governmental Issuer Loans [Member] | Legacy Commons at Signal Hills [Member] | TOB Trust [Member] | St. Paul, MN [Member]
Governmental Issuer Loans [Line Items]
Month Acquired		January 2021	[1]		January 2021	[2]
Units | Unit		247	[1]		247	[2]
Original Maturity Date		Feb. 01, 2024	[1],[3]		Feb. 01, 2024	[2],[4]
Current Interest Rate		3.57%	[1]		3.57%	[2]
Amortized Cost		$ 34,620,000	[1]		$ 33,120,605	[2]
Governmental Issuer Loans [Member] | Legacy Commons at Signal Hills [Member] | TOB Trust [Member] | SOFR [Member] | St. Paul, MN [Member]
Governmental Issuer Loans [Line Items]
Variable Interest Rate	[5]	3.07%	[1]		3.07%	[2]
Governmental Issuer Loans [Member] | Hilltop at Signal Hills [Member] | TOB Trust [Member] | St. Paul, MN [Member]
Governmental Issuer Loans [Line Items]
Month Acquired		January 2021	[1]		January 2021	[2]
Units | Unit		146	[1]		146	[2]
Original Maturity Date		Aug. 01, 2023	[1],[3]		Aug. 01, 2023	[2],[4]
Current Interest Rate		3.57%	[1]		3.57%	[2]
Amortized Cost		$ 24,450,000	[1]		$ 21,550,584	[2]
Governmental Issuer Loans [Member] | Hilltop at Signal Hills [Member] | TOB Trust [Member] | SOFR [Member] | St. Paul, MN [Member]
Governmental Issuer Loans [Line Items]
Variable Interest Rate	[5]	3.07%	[1]		3.07%	[2]
Governmental Issuer Loans [Member] | Hope on Avalon [Member] | TOB Trust [Member]
Governmental Issuer Loans [Line Items]
Original Maturity Date	[7]			Feb. 01, 2023
Governmental Issuer Loans [Member] | Hope on Avalon [Member] | TOB Trust [Member] | Los Angeles, CA [Member]
Governmental Issuer Loans [Line Items]
Month Acquired		January 2021			January 2021
Units | Unit		88			88
Original Maturity Date		Feb. 01, 2023	[3]		Feb. 01, 2023	[4]
Current Interest Rate		4.60%			4.60%
Amortized Cost		$ 10,981,200			$ 9,981,200
Governmental Issuer Loans [Member] | Hope on Avalon [Member] | TOB Trust [Member] | SIFMA [Member] | Los Angeles, CA [Member]
Governmental Issuer Loans [Line Items]
Variable Interest Rate	[5]	3.75%			3.75%
Governmental Issuer Loans [Member] | Hope on Broadway [Member] | TOB Trust [Member] | Los Angeles, CA [Member]
Governmental Issuer Loans [Line Items]
Month Acquired		January 2021			January 2021
Units | Unit		49			49
Original Maturity Date		Feb. 01, 2023	[3]		Feb. 01, 2023	[4]
Current Interest Rate		4.60%			4.60%
Amortized Cost		$ 8,691,245			$ 3,691,245
Governmental Issuer Loans [Member] | Hope on Broadway [Member] | TOB Trust [Member] | SIFMA [Member] | Los Angeles, CA [Member]
Governmental Issuer Loans [Line Items]
Variable Interest Rate	[5]	3.75%			3.75%
Governmental Issuer Loans [Member] | Osprey Village [Member] | TOB Trust [Member] | Kissimmee FL [Member]
Governmental Issuer Loans [Line Items]
Month Acquired		July 2021	[1]		July 2021	[4]
Units | Unit		383	[1]		383	[4]
Original Maturity Date		Aug. 01, 2024	[1],[3]		Aug. 01, 2024	[4]
Current Interest Rate		3.57%	[1]		3.57%	[4]
Amortized Cost		$ 11,855,357	[1]		$ 6,372,030	[4]
Governmental Issuer Loans [Member] | Osprey Village [Member] | TOB Trust [Member] | SOFR [Member] | Kissimmee FL [Member]
Governmental Issuer Loans [Line Items]
Variable Interest Rate	[5]	3.07%	[1]		3.07%	[4]
Governmental Issuer Loans [Member] | Willow Place Apartments [Member] | TOB Trust [Member] | McDonough, GA [Member]
Governmental Issuer Loans [Line Items]
Month Acquired		September 2021	[1]		September 2021	[4]
Units | Unit		182	[1]		182	[4]
Original Maturity Date		Oct. 01, 2024	[1],[3]		Oct. 01, 2024	[4]
Current Interest Rate		3.59%	[1]		3.55%	[4]
Amortized Cost		$ 3,971,786	[1]		$ 2,971,786	[4]
Governmental Issuer Loans [Member] | Willow Place Apartments [Member] | TOB Trust [Member] | SOFR [Member] | McDonough, GA [Member]
Governmental Issuer Loans [Line Items]
Variable Interest Rate	[5]	3.30%	[1]		3.30%	[4]

[1] The Freddie Mac servicer that has forward committed to purchase the GIL at maturity is an affiliate of the Partnership (Note 21).

[2] The Freddie Mac servicer that has forward committed to purchase the GIL at maturity is an affiliate of the Partnership (Note 21).

[3] The borrower may elect to extend the maturity date to for a period ranging between six and twelve months upon meeting certain conditions, including payment of a non-refundable extension fee.

[4] The borrower may elect to extend the maturity date to for a period ranging between six and twelve months upon meeting certain conditions, including payment of a non-refundable extension fee.

[5] The variable index interest rate component is subject to a floor

[6] The variable rate decreases to SIFMA plus 2.25% upon completion of construction.

[7] The borrower has the option to extend the maturity up to six months upon payment of a non-refundable extension fee