Derivative Liability (Tables)

12 Months Ended

Jul. 31, 2013

Derivative Liability [Abstract]

Schedule of Derivative Instruments [Table Text Block]

	July 31, 2013		July 31, 2012
Volatility	144.5	%	85.0	%
Risk-free interest rate	0.97	%	0.53	%
Dividend yield	0.0	%	0.0	%
Expected life	3.4 years		0.42 - 4.4 years