Investment in Joint Venture (Schedule of Financial Information for Joint Venture) (Details) (Fund VIII-IX Associates, USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Fund VIII-IX Associates
Schedule of Equity Method Investments [Line Items]
Total Revenues	$ 0	$ 207,814	$ 0	$ 393,365
Income (Loss) From Continuing Operations	(121,932)	98,857	(276,516)	183,920
Income From Discontinued Operations	1,348	77,751	2,114,646	160,405
Net Income	$ (120,584)	$ 176,608	$ 1,838,130	$ 344,325