Subsequent Events (Details) (USD $)	Jul. 18, 2012	Jun. 30, 2012
Subsequent Events (Textual)
Purchase of industrial building area, (In square foot)	102,594
Percentage of building area leased to FedEx Ground Package Systems, Inc	100.00%
Purchase price of industrial building	$ 8,733,000
Mortgage in connection with the acquisition of the property in Waco, TX	$ 5,800,000	$ 5,800,000
Interest rate on mortgage	4.75%
Mortgage maturity date	Aug. 01, 2022