Mortgage Loans on Real Estate (Details) - USD ($)		12 Months Ended
		Dec. 31, 2016		Dec. 31, 2015
Face Amount	[1]	$ 2,850,000
Carrying Amount		$ 2,850,000	[1]	$ 10,650,566
Residential whole loan One [Member]
Rate	[1]	3.625%
Final Maturity Date	[1]	Apr. 01, 2030
Periodic Payment Terms	[1]	P&I
Face Amount	[1]	$ 558,000
Carrying Amount	[1]	$ 559,000
Residential whole loan Two [Member]
Rate	[1]	4.375%
Final Maturity Date	[1]	Nov. 01, 2044
Periodic Payment Terms	[1]	P&I
Face Amount	[1]	$ 502,000
Carrying Amount	[1]	$ 507,000
Residential whole loan Three [Member]
Rate	[1]	3.75%
Final Maturity Date	[1]	May 01, 2046
Periodic Payment Terms	[1]	P&I
Face Amount	[1]	$ 509,000
Carrying Amount	[1]	$ 498,000
Residential whole loan Four [Member]
Rate	[1]	4.375%
Final Maturity Date	[1]	Jun. 01, 2046
Periodic Payment Terms	[1]	P&I
Face Amount	[1]	$ 585,000
Carrying Amount	[1]	$ 591,000
Residential whole loan Five [Member]
Rate	[1]	4.125%
Final Maturity Date	[1]	Jul. 01, 2046
Periodic Payment Terms	[1]	P&I
Face Amount	[1]	$ 696,000
Carrying Amount	[1]	$ 695,000

[1] No loans subject to delinquent principal or interest