Investment in Joint Venture (Schedule of Financial Information for Joint Venture) (Details) (Fund VIII-IX Associates, USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Fund VIII-IX Associates
Schedule of Equity Method Investments [Line Items]
Total Revenues	$ 0	$ 53,614	$ 0	$ 446,979
Income (Loss) From Continuing Operations	(128,920)	(56,633)	(405,436)	127,287
Income (Loss) From Discontinued Operations	(631)	63,866	2,114,015	224,271
Net Income (Loss)	$ (129,551)	$ 7,233	$ 1,708,579	$ 351,558