Property Loans, Net of Loan Loss Allowances - Summary of Partnership's Property Loans, Net of Loan Loss Allowances (Details) - USD ($)		12 Months Ended
		Dec. 31, 2021		Dec. 31, 2020		Dec. 31, 2019
Accounts Notes And Loans Receivable [Line Items]
Property loan receivable, outstanding balance		$ 76,850,616		$ 21,225,765
Loan Loss Allowance		(8,749,348)		(8,305,046)		$ (7,393,814)
Property Loan Principal, net of allowance		$ 68,101,268		$ 12,920,719
Avistar (February 2013 Portfolio) [Member]
Accounts Notes And Loans Receivable [Line Items]
Maturity Date		Jun. 26, 2024		Jun. 26, 2024
Interest Rate		12.00%		12.00%
Property loan receivable, outstanding balance		$ 201,972		$ 201,972
Property Loan Principal, net of allowance		$ 201,972		$ 201,972
Avistar (June 2013 Portfolio) [Member]
Accounts Notes And Loans Receivable [Line Items]
Maturity Date		Jun. 26, 2024		Jun. 26, 2024
Interest Rate		12.00%		12.00%
Property loan receivable, outstanding balance		$ 251,622		$ 251,622
Property Loan Principal, net of allowance		$ 251,622		$ 251,622
Centennial Crossings [Member]
Accounts Notes And Loans Receivable [Line Items]
Maturity Date		Sep. 01, 2023	[1],[2],[3]	Sep. 01, 2023	[4],[5],[6]
Property loan receivable, outstanding balance		$ 11,354,386	[2],[3]	$ 3,017,729	[5],[6]
Property Loan Principal, net of allowance		$ 11,354,386	[2],[3]	$ 3,017,729	[5],[6]
Centennial Crossings [Member] | LIBOR [Member]
Accounts Notes And Loans Receivable [Line Items]
Interest Rate		2.50%	[2],[3],[7]	2.50%	[5],[6],[8]
Cross Creek [Member]
Accounts Notes And Loans Receivable [Line Items]
Maturity Date		Dec. 01, 2025		Dec. 01, 2025
Interest Rate		6.15%		6.15%
Property loan receivable, outstanding balance		$ 11,101,887		$ 11,101,887
Loan Loss Allowance		(7,393,814)		(7,393,814)
Property Loan Principal, net of allowance		$ 3,708,073		$ 3,708,073
Greens Property [Member]
Accounts Notes And Loans Receivable [Line Items]
Maturity Date		Sep. 01, 2046		Sep. 01, 2046
Interest Rate		10.00%		10.00%
Property loan receivable, outstanding balance		$ 850,000		$ 850,000
Property Loan Principal, net of allowance		$ 850,000		$ 850,000
Hilltop at Signal Hills [Member]
Accounts Notes And Loans Receivable [Line Items]
Maturity Date	[1],[2],[3]	Aug. 01, 2023
Property loan receivable, outstanding balance	[2],[3]	$ 1,000,000
Property Loan Principal, net of allowance	[2],[3]	$ 1,000,000
Hilltop at Signal Hills [Member] | SOFR [Member]
Accounts Notes And Loans Receivable [Line Items]
Interest Rate	[2],[3],[7]	3.07%
Legacy Commons at Signal Hills [Member]
Accounts Notes And Loans Receivable [Line Items]
Maturity Date	[1],[2],[3]	Feb. 01, 2024
Property loan receivable, outstanding balance	[2],[3]	$ 2,604,230
Property Loan Principal, net of allowance	[2],[3]	$ 2,604,230
Legacy Commons at Signal Hills [Member] | SOFR [Member]
Accounts Notes And Loans Receivable [Line Items]
Interest Rate	[2],[3],[7]	3.07%
Live 929 Apartments [Member]
Accounts Notes And Loans Receivable [Line Items]
Maturity Date		Jul. 31, 2049		Jul. 31, 2049
Interest Rate		8.00%		8.00%
Property loan receivable, outstanding balance		$ 1,355,534		$ 911,232
Loan Loss Allowance		$ (1,355,534)		$ (911,232)
Magnolia Crossing [Member]
Accounts Notes And Loans Receivable [Line Items]
Maturity Date		Dec. 01, 2022
Property loan receivable, outstanding balance		$ 13,424,579
Property Loan Principal, net of allowance		$ 13,424,579
Magnolia Crossing [Member] | SOFR [Member]
Accounts Notes And Loans Receivable [Line Items]
Interest Rate	[9]	6.50%
Oasis at Twin Lakes [Member]
Accounts Notes And Loans Receivable [Line Items]
Maturity Date	[1],[2],[3]	Aug. 01, 2023
Property loan receivable, outstanding balance	[2],[3]	$ 20,607,362
Property Loan Principal, net of allowance	[2],[3]	$ 20,607,362
Oasis at Twin Lakes [Member] | LIBOR [Member]
Accounts Notes And Loans Receivable [Line Items]
Interest Rate	[2],[3],[7]	2.50%
Ohio Properties [Member]
Accounts Notes And Loans Receivable [Line Items]
Interest Rate		10.00%		10.00%
Property loan receivable, outstanding balance		$ 2,390,446		$ 2,390,446
Property Loan Principal, net of allowance		$ 2,390,446		$ 2,390,446
Ohio Properties [Member] | Minimum [Member]
Accounts Notes And Loans Receivable [Line Items]
Maturity Date		Dec. 01, 2026		Dec. 01, 2026
Ohio Properties [Member] | Maximum [Member]
Accounts Notes And Loans Receivable [Line Items]
Maturity Date		Jun. 01, 2050		Jun. 01, 2050
Osprey Village [Member]
Accounts Notes And Loans Receivable [Line Items]
Maturity Date	[1],[2],[3]	Aug. 01, 2024
Property loan receivable, outstanding balance	[2],[3]	$ 1,000,000
Property Loan Principal, net of allowance	[2],[3]	$ 1,000,000
Osprey Village [Member] | SOFR [Member]
Accounts Notes And Loans Receivable [Line Items]
Interest Rate	[2],[3],[7]	3.07%
Scharbauer Flats Apartments [Member]
Accounts Notes And Loans Receivable [Line Items]
Maturity Date		Jan. 01, 2023	[1],[2],[3]	Jan. 01, 2023	[4],[5],[6]
Property loan receivable, outstanding balance		$ 9,708,598	[2],[3]	$ 2,309,613	[5],[6]
Property Loan Principal, net of allowance		$ 9,708,598	[2],[3]	$ 2,309,613	[5],[6]
Scharbauer Flats Apartments [Member] | LIBOR [Member]
Accounts Notes And Loans Receivable [Line Items]
Interest Rate		2.85%	[2],[3]	2.85%	[5],[6]
Willow Place Apartments [Member]
Accounts Notes And Loans Receivable [Line Items]
Maturity Date	[1],[2],[3]	Oct. 01, 2024
Property loan receivable, outstanding balance	[2],[3]	$ 1,000,000
Property Loan Principal, net of allowance	[2],[3]	$ 1,000,000
Willow Place Apartments [Member] | SOFR [Member]
Accounts Notes And Loans Receivable [Line Items]
Interest Rate	[2],[3],[9]	3.30%
Arbors at Hickory Ridge [Member]
Accounts Notes And Loans Receivable [Line Items]
Maturity Date				Mar. 01, 2049
Interest Rate				6.25%
Property loan receivable, outstanding balance				$ 191,264
Property Loan Principal, net of allowance				$ 191,264

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

[2] The property loan and associated GIL are on parity and share a first mortgage lien position on all real and personal property associated with the underlying property. Affiliates of the borrower have guaranteed limited-to-full payment of principal and accrued interest on the property loan.

[3] The property loan is held in trust in connection with a TOB financings (Note 16).

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

[5] The property loan and associated GIL are on parity and share a first mortgage lien position on all real and personal property associated with the underlying property. Affiliates of the borrower have guaranteed limited-to-full payment of principal and accrued interest on the property loan.

[6] The property loan is held in trust in connection with a TOB financings (Note 16).

[7] The index is subject to a floor of 0.50%.

[8] The index is subject to a floor of 0.50%.

[9] The index is subject to a floor of 0.25%.