Stock-Based Compensation (Details Textual) (USD $)	1 Months Ended		6 Months Ended
	Feb. 01, 2013	Nov. 01, 2012	Jan. 31, 2013	Jul. 31, 2012	Jan. 31, 2013 Stock Option Plan 2001 [Member]	Jul. 31, 2012 Stock Option Plan 2001 [Member]	Jan. 31, 2013 Stock Option Plan 2006 [Member]	Jul. 31, 2012 Stock Option Plan 2006 [Member]	Jul. 31, 2009 Stock Option Plan 2006 [Member]
Common Stock, Capital Shares Reserved for Future Issuance					4,555,222	12,000,000	8,122,456	30,000,000	10,000,000
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized			$ 27,373
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Period for Recognition	8 months 9 days	11 months 9 days	3 years 8 months 16 days
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number			10,453,155	10,979,634