Mortgage Loans - Schedule of Mortgage Loans (Details) - USD ($)	6 Months Ended
	Jun. 30, 2020	Dec. 31, 2019
Accounts, Notes, Loans and Financing Receivable [Line Items]
Mortgage Loan	$ 187,311,000	$ 159,411,000
Deferred Financing Costs, Net	(1,189,835)	(934,146)
Mortgage Loans, Net	$ 186,121,165	$ 158,476,854
One Month LIBOR	0.16%	1.76%
Anzio Apartment Mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Mortgage Loan	$ 44,400,000	$ 44,400,000
Two Liberty Center Mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Mortgage Loan	61,971,000	61,971,000
Ezlyn Mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Mortgage Loan	$ 53,040,000	53,040,000
Stated interest rate	3.38%
Lakes Mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Mortgage Loan	$ 27,900,000	$ 0
London Interbank Offered Rate (LIBOR) [Member] | Anzio Apartment Mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Investment Interest Rate	1.59%
London Interbank Offered Rate (LIBOR) [Member] | Two Liberty Center Mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Investment Interest Rate	1.50%
London Interbank Offered Rate (LIBOR) [Member] | Lakes Mortgage
Accounts, Notes, Loans and Financing Receivable [Line Items]
Investment Interest Rate	1.55%