Accounts Payable and Accrued Expenses - Accounts payable and accrues expenses (Details) - USD ($)	Apr. 30, 2017	Jul. 31, 2016
Payables and Accruals [Abstract]
Accounts Payable and Accruals – General and Administrative	$ 4,278,862	$ 3,750,638
Accounts Payable and Accruals – Research and Development	4,832,696	4,395,061
Accounts Payable and Accruals – Selling and Marketing	385,813	326,229
Accrued Make-whole Payments on Convertible Preferred Stock (see Note 8)		167,400
Executive Compensation and Directors’ Fees Payable	368,114	311,542
Total	$ 9,865,484	$ 8,950,870