Derivative Liability (Tables)

9 Months Ended

Apr. 30, 2013

Derivative Liability [Abstract]

Schedule of Derivative Instruments

	April 30, 2013		July 31, 2012
Volatility	90.0	%	85.0	%
Risk-free interest rate	0.68	%	0.53	%
Dividend yield	0.0	%	0.0	%
Expected life	3.7 years		0.42 - 4.4 years