Derivative Liabilities

12 Months Ended

Jul. 31, 2014

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Derivative Liabilities:

Note 10 - Derivative Liabilities:

Derivative warrant liability

The Company has warrants outstanding with price protection provisions that allow for the reduction in the exercise price of the warrants in the event the Company subsequently issues stock or securities convertible into stock at a price lower than the exercise price of the warrants. Simultaneously with any reduction to the exercise price, the number of shares of common stock that may be purchased upon exercise of each of these warrants shall be increased or decreased proportionately, so that after such adjustment the aggregate exercise price payable for the adjusted number of warrants shall be the same as the aggregate exercise price in effect immediately prior to such adjustment.

Accounting for Derivative Warrant Liability

The Company’s derivative warrant instruments have been measured at fair value at July 31, 2014 and 2013 using the binomial lattice model. The Company recognizes all of its warrants with price protection in its consolidated balance sheets as a liability. The liability is revalued at each reporting period and changes in fair value are recognized currently in the consolidated statements of operations. The initial recognition and subsequent changes in fair value of the derivative warrant liability have no effect on the Company’s consolidated cash flows.

The derivative warrants outstanding at July 31, 2014 are all currently exercisable with a weighted-average remaining life of 3.3 years.

The revaluation of the warrants at each reporting period, as well as the charges associated with issuing additional warrants due to the price protection features, resulted in the recognition of a gain of $3,362,497 within the Company’s consolidated statements of operations for the fiscal year ended July 31, 2014 and a loss of $3,148,782 for the fiscal year ended July 31, 2013, which is included in the consolidated statements of operations under the caption “Change in fair value of derivative liabilities”. The fair value of the warrants at July 31, 2014 and 2013 was $2,635,643 and $5,234,293, respectively, which is reported on the consolidated balance sheets under the caption “Derivative Warrant Liability”. The following summarizes the changes in the value of the derivative warrant liability from August 1, 2012 until July 31, 2014:

		Value		No. of Warrants
Balance at August 1, 2012 – Derivative warrant liability	$	4,081,627		55,148,530
Additional warrants issued in August 2012 financing		624,797		9,375,000
Additional warrants issued in December 2012 financing		762,355		24,999,999
Additional warrants issued in June 2013 financing		1,189,744		40,833,335
Additional warrants from price protection features of existing warrants		7,484,550		236,219,094
Exercise of warrants		(5,629,130	)	(145,888,421	)
Decrease in fair value of derivative warrant liability		(3,279,650	)	n/a
Balance at July 31, 2013 – Derivative warrant liability	$	5,234,293		220,687,537
Exercise of warrants		(2,194,496	)	(76,732,020	)
Additional warrants issued in January 2014 financing		942,279		26,666,668
Additional warrants issued in March 2014 financing		2,016,064		69,166,667
Decrease in fair value of derivative warrant liability		(3,362,497	)	n/a
Balance at July 31, 2014 – Derivative warrant liability	$	2,635,643		239,788,852

Fair Value Assumptions Used in Accounting for Derivative Warrant Liability

The Company has determined its derivative warrant liability to be a Level 2 fair value measurement and has used the binominal lattice pricing model to calculate the fair value as of July 31, 2014 and 2013. The binomial lattice model requires six basic data inputs: the exercise or strike price, time to expiration, the risk free interest rate, the current stock price, the estimated volatility of the stock price in the future, and the dividend rate. Because the warrants contain the price protection feature, the probability that the exercise price of the warrants would decrease as the stock price decreased was incorporated into the valuation calculations. The key inputs used in the July 31, 2014 and 2013 fair value calculations were as follows:

		July 31, 2014			July 31, 2013
Current exercise price	$	0.03		$	0.03
Time to expiration		3.3 years			3.5 years
Risk-free interest rate		1.02	%		0.49	%
Estimated volatility		80	%		85	%
Dividend		-0-			-0-
Stock price at period end date	$	0.021		$	0.035

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

The Company has determined the derivative additional investment rights liability to be a Level 2 fair value measurement and has used the binominal lattice pricing model to measure the fair value. The fair value of the derivative liability associated with the additional investment rights was determined to be $719,088 and $1,256,160 at July 31, 2014 and 2013, respectively. The key inputs used in the fair value calculation at July 31, 2014 were as follows:

		July 31, 2014			July 31, 2013
Underlying number of units of convertible preferred stock		2,075			1,225
Underlying number of warrants		69,166,667			40,833,335
Current exercise price of warrants	$	0.03		$	0.03
Current conversion price of preferred stock	$	0.03		$	0.03
Time to expiration		0.65 years			0.88 years
Risk-free interest rate		0.09	%		0.11	%
Estimated volatility		61	%		114	%
Dividend		-0-			-0-
Stock price	$	0.021		$	0.035

The revaluation of the additional investment rights in the fiscal year ended July 31, 2014 and 2013, resulted in the recognition of a gain of $1,163,242 and $8,523, respectively within the Company’s consolidated statements of operations, which is included in the totals under the caption “Change in fair value of derivative liabilities”.