Derivative Liabilities (Tables)

12 Months Ended

Jul. 31, 2016

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Changes in value of derivative warrant liability

	Value			No. of Warrants
Balance at August 1, 2014 – Derivative warrant liability	$	2,635,643			239,788,852
Additional warrants from price protection features of existing warrants		2,111,077			239,788,852
Additional warrants issued in June 2015 financing		354,535			33,333,333
Decrease in fair value of derivative warrant liability		(2,737,840	)		n/a
Balance at July 31, 2015 – Derivative warrant liability		2,363,415			512,911,037
Forfeited or expired		(455,573	)		(129,033,516	)
Increase in fair value of derivative warrant liability		141,004			n/a
Balance at July 31, 2016 – Derivative warrant liability	$	2,048,846			383,877,521

Fair Value Assumptions Used in Accounting for Derivative Warrant Liability

	July 31, 2016			July 31, 2015
Current exercise price	$	0.015		$	0.015
Time to expiration		2.1 years			2.5 years
Risk-free interest rate		0.76	%		1.08	%
Estimated volatility		101	%		82	%
Dividend		-0-			-0-
Stock price at period end date	$	0.008		$	0.010

Fair Value Assumptions Used in Accounting for Derivative Additional Investment Rights Liability

	July 31, 2016			July 31, 2015
Underlying number of units of convertible preferred stock		500			500
Underlying number of units of warrants		33,333,333			33,333,333
Current exercise price of warrants	$	0.015		$	0.015
Current conversion price of preferred stock	$	0.015		$	0.015
Time to expiration		0.05 years			1.05 years
Risk-free interest rate		0.38	%		0.30	%
Estimated volatility		13	%		79	%
Dividend		-0-			-0-
Stock price at period end date	$	0.008		$	0.010