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Summary of Partnership's Property Loans, Net of Loan Loss Allowances (Details) - USD ($)
Jun. 30, 2017
Dec. 31, 2016
Accounts Notes And Loans Receivable [Line Items]    
Property loan receivable, outstanding balance $ 38,702,784 $ 36,862,148
Loan Loss Allowances (7,098,814) (7,098,814)
Property Loan Principal, net of allowance 31,603,970 29,763,334
Arbors at Hickory Ridge [Member]    
Accounts Notes And Loans Receivable [Line Items]    
Property loan receivable, outstanding balance 191,264 191,264
Loan Loss Allowances 0 0
Property Loan Principal, net of allowance 191,264 191,264
Ashley Square [Member]    
Accounts Notes And Loans Receivable [Line Items]    
Property loan receivable, outstanding balance 5,078,342 5,078,342
Loan Loss Allowances (3,596,342) (3,596,342)
Property Loan Principal, net of allowance 1,482,000 1,482,000
Avistar (February 2013 Portfolio) [Member]    
Accounts Notes And Loans Receivable [Line Items]    
Property loan receivable, outstanding balance 274,496 274,496
Loan Loss Allowances 0 0
Property Loan Principal, net of allowance 274,496 274,496
Avistar (June 2013 Portfolio) [Member]    
Accounts Notes And Loans Receivable [Line Items]    
Property loan receivable, outstanding balance 251,622 251,622
Loan Loss Allowances 0 0
Property Loan Principal, net of allowance 251,622 251,622
Cross Creek [Member]    
Accounts Notes And Loans Receivable [Line Items]    
Property loan receivable, outstanding balance 7,155,545 7,155,545
Loan Loss Allowances (3,447,472) (3,447,472)
Property Loan Principal, net of allowance 3,708,073 3,708,073
Greens of Pine Glen [Member]    
Accounts Notes And Loans Receivable [Line Items]    
Property loan receivable, outstanding balance 850,000 850,000
Loan Loss Allowances 0 0
Property Loan Principal, net of allowance 850,000 850,000
Lake Forest [Member]    
Accounts Notes And Loans Receivable [Line Items]    
Property loan receivable, outstanding balance 4,623,704 4,623,704
Loan Loss Allowances (55,000) (55,000)
Property Loan Principal, net of allowance 4,568,704 4,568,704
Ohio Properties [Member]    
Accounts Notes And Loans Receivable [Line Items]    
Property loan receivable, outstanding balance 2,390,446 2,390,446
Loan Loss Allowances 0 0
Property Loan Principal, net of allowance 2,390,446 2,390,446
Vantage at Brooks LLC [Member]    
Accounts Notes And Loans Receivable [Line Items]    
Property loan receivable, outstanding balance 8,417,635 7,199,424
Loan Loss Allowances 0 0
Property Loan Principal, net of allowance 8,417,635 7,199,424
Vantage at Braunfels LLC [Member]    
Accounts Notes And Loans Receivable [Line Items]    
Property loan receivable, outstanding balance 7,469,730 6,347,305
Loan Loss Allowances 0 0
Property Loan Principal, net of allowance 7,469,730 6,347,305
Winston Group, Inc [Member]    
Accounts Notes And Loans Receivable [Line Items]    
Property loan receivable, outstanding balance 2,000,000 2,500,000
Loan Loss Allowances 0 0
Property Loan Principal, net of allowance $ 2,000,000 $ 2,500,000