Property Loan, Net of Loan Loss Allowances Narrative Tagging (Details) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Jun. 30, 2015	Apr. 30, 2015
Property Loan Net Of Loan Loss Allowances [Line Items]
Property loan receivable, net	$ 29,763,334	$ 22,775,709
Contingent interest	2,021,077	4,756,716	$ 40,000
Provision for loan loss	0	0	75,000
Cross Creek [Member]
Property Loan Net Of Loan Loss Allowances [Line Items]
Property loan receivable, net	83,500	96,000
Provision for loan loss			$ 75,000
Foundation for Affordable Housing [Member]
Property Loan Net Of Loan Loss Allowances [Line Items]
Property loan receivable, net	2,500
Contingent interest	1,400,000
Repayment of property loan, principal		$ 145,000
Winston Group, Inc [Member]
Property Loan Net Of Loan Loss Allowances [Line Items]
Property loan receivable, net	2,500,000
Vantage at Brooks LLC [Member]
Property Loan Net Of Loan Loss Allowances [Line Items]
Property loan receivable, net	3,700,000
Vantage at Braunfels LLC [Member]
Property Loan Net Of Loan Loss Allowances [Line Items]
Property loan receivable, net	$ 2,100,000
Silver Moon [Member]
Property Loan Net Of Loan Loss Allowances [Line Items]
Property loan receivable, net				$ 2,800,000
The Suites on Paseo [Member]
Property Loan Net Of Loan Loss Allowances [Line Items]
Property loan receivable, net					$ 567,000
Ohio Properties [Member] | Maximum [Member]
Property Loan Net Of Loan Loss Allowances [Line Items]
Percentage of deferred interest earned on property loans		100.00%