Mortgage Payable and Other Secured Financing - Summary of Partnerships' Mortgage Payable and Other Secured Financing, Net of Deferred Financing Costs (Details) - USD ($)		6 Months Ended	12 Months Ended
		Jun. 30, 2020	Dec. 31, 2019
Mortgage Loans on Real Estate [Line Items]
Outstanding Mortgage Payable, net		$ 26,391,908	$ 26,802,246
Period End Rate		4.36%	4.74%
Tax Increment Financing [Member] | Real Estate [Member] | The 50/50 Student Housing--UNL [Member]
Mortgage Loans on Real Estate [Line Items]
Outstanding Mortgage Payable, net		$ 2,680,578	$ 2,859,390
Year Acquired		2020	2014
Stated Maturity		2025-03	2020-03
Variable / Fixed		Fixed	Fixed
Period End Rate		4.40%	4.65%
Reset Frequency			N/A
Mortgages payable [Member] | Real Estate [Member] | The 50/50 Student Housing--UNL [Member]
Mortgage Loans on Real Estate [Line Items]
Outstanding Mortgage Payable, net		$ 23,711,330	$ 23,942,856
Year Acquired		2020	2013
Stated Maturity		2027-04	2020-03
Variable / Fixed		Fixed	Variable
Period End Rate		4.35%	4.75%
Reset Frequency			Monthly
Variable Based Rate	[1]		4.75%

[1] Variable rate is based on the Wall Street Journal Prime Rate, but not to exceed 5.0%.