Fair value of Accounting allocation of initial proceeds - Series A, B, C, D & E 9% Convertible Preferred Stock (Details) (USD $)	12 Months Ended						213 Months Ended	12 Months Ended	3 Months Ended	12 Months Ended
	Jul. 31, 2013	Jul. 31, 2012	Jul. 31, 2011	Jul. 31, 2004	Jul. 31, 2003	Jul. 31, 2002	Jul. 31, 2013	Jul. 31, 2012 Series B Convertible Preferred Stock	Oct. 31, 2012 Series C Convertible Preferred Stock	Jul. 31, 2013 Series E Convertible Preferred Stock
Net proceeds	$ 2,615,000	$ 1,975,000	$ 2,315,000				$ 18,920,000	$ 1,975,000	$ 725,000	$ 1,165,000
Derivative warrant liability fair value								(1,811,746)	(624,797)	(1,189,744)
Derivative additional investment rights fair value										(1,264,683)
Make whole payments liability								(540,000)	(202,500)	(330,750)
Deemed dividend	$ (1,722,474)	$ (376,746)	$ (766,417)	$ (810,003)	$ (764,154)	$ (720,900)		$ (376,746)	$ (102,297)	$ (1,620,177)