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Accounts Payable and Accrued Expenses - Accounts payable and accrues expenses (Details) (USD $)	Apr. 30, 2015	Jul. 31, 2014
Payables and Accruals [Abstract]
Accounts Payable and Accruals – General and Administrative	$ 3,127,111	$ 3,208,069
Accounts Payable and Accruals – Research and Development	3,699,158	3,955,543
Accounts Payable and Accruals – Selling and Marketing	326,586us-gaap_AccruedMarketingCostsCurrent	3,955,543us-gaap_AccruedMarketingCostsCurrent
Accrued Make-whole Payments on Convertible Preferred Stock (see Note 8)	233,077	337,500
Executive Compensation and Directors’ Fees Payable	236,547	205,943
Total	$ 7,622,479	$ 8,034,122

Sum of the carrying values as of the balance sheet date of obligations incurred through that date, including liabilities incurred and payable to vendors for goods and services received, taxes, interest, rent and utilities, compensation costs, payroll taxes and fringe benefits (other than pension and postretirement obligations), contractual rights and obligations, and statutory obligations.

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