Accounts Payable and Accrued Expenses - Accounts payable and accrued expenses (Details) (USD $)	Apr. 30, 2014	Jul. 31, 2013
Payables and Accruals [Abstract]
Accounts Payable & Accruals -General and Administrative	$ 3,200,070	$ 3,447,618
Accounts Payable & Accruals - Research and Development	3,890,361	3,557,184
Accounts Payable & Accruals - Selling and Marketing	327,012	328,629
Accrued Make Whole Payments on Convertible Preferred Stock (see Note 9)	504,900	251,100
Executive Compensation and Directors' Fees Payable	183,013	76,703
Total	$ 8,105,356	$ 7,661,234