Property Loans, Net of Loan Loss Allowances - Summary of Partnership's Property Loans, Net of Loan Loss Allowances (Details) - USD ($)		Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Accounts Notes And Loans Receivable [Line Items]
Property loan receivable, outstanding balance		$ 21,225,765	$ 15,392,908
Loan Loss Allowance		(8,305,046)	(7,393,814)	$ (7,393,814)
Property Loan Principal, net of allowance		12,920,719	7,999,094
Arbors at Hickory Ridge [Member]
Accounts Notes And Loans Receivable [Line Items]
Property loan receivable, outstanding balance		191,264	191,264
Property Loan Principal, net of allowance		191,264	191,264
Avistar (February 2013 Portfolio) [Member]
Accounts Notes And Loans Receivable [Line Items]
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]
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]
Property loan receivable, outstanding balance	[1]	3,017,729
Property Loan Principal, net of allowance	[1]	3,017,729
Cross Creek [Member]
Accounts Notes And Loans Receivable [Line Items]
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]
Property loan receivable, outstanding balance		850,000	850,000
Property Loan Principal, net of allowance		850,000	850,000
Live 929 Apartments [Member]
Accounts Notes And Loans Receivable [Line Items]
Property loan receivable, outstanding balance		911,232	405,717
Loan Loss Allowance		(911,232)
Property Loan Principal, net of allowance			405,717
Ohio Properties [Member]
Accounts Notes And Loans Receivable [Line Items]
Property loan receivable, outstanding balance		2,390,446	2,390,446
Property Loan Principal, net of allowance		2,390,446	$ 2,390,446
Scharbauer Flats Apartments [Member]
Accounts Notes And Loans Receivable [Line Items]
Property loan receivable, outstanding balance	[1]	2,309,613
Property Loan Principal, net of allowance	[1]	$ 2,309,613

[1] ^{Property loans are held in trust in connection with a TOB Financings (see Note 16).}