Investment in Joint Ventures (Schedule of Financial Information for Joint Ventures) (Details) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Schedule of Equity Method Investments [Line Items]
Total Revenues	$ 1,868,845	$ 2,040,165	$ 1,960,816
Income (Loss) From Continuing Operations	341,406	437,501	318,348
Income (Loss) From Discontinued Operations	0	1,335,377	(850,397)
Net Income (Loss)	341,406	1,772,878	(532,049)
Fund VIII-IX Associates
Schedule of Equity Method Investments [Line Items]
Total Assets	9,456,156	10,163,823
Total Liabilities	364,178	785,096
Total Equity	9,091,978	9,378,727
Total Revenues	1,868,845	2,040,165	1,960,816
Income (Loss) From Continuing Operations	341,406	462,169	357,084
Income (Loss) From Discontinued Operations		0	0
Net Income (Loss)	341,406	462,169	357,084
Fund IX-X-XI-REIT Associates
Schedule of Equity Method Investments [Line Items]
Total Revenues	0	0	0
Income (Loss) From Continuing Operations	0	(24,668)	(38,736)
Income (Loss) From Discontinued Operations	0	1,335,377	(850,397)
Net Income (Loss)	$ 0	$ 1,310,709	$ (889,133)