Financial Instruments and Credit Risk Concentrations (Details Textual) (USD $)	6 Months Ended
	Jan. 31, 2013	Jan. 31, 2013 Credit Concentration Risk [Member]	Jul. 31, 2012 Credit Concentration Risk [Member]
Percentage On Rental Income Of Tenant 1	19.29%
Percentage On Rental Income Of Tenant 2	15.60%
Maximum Percentage Of Accounted Rental Income For Other Tenant	10.00%
Security Deposits Payable		$ 230,000	$ 230,000