Derivative Liabilities - Fair value assumptions, derivative additional investment rights liability (Details) (USD $)	3 Months Ended	12 Months Ended
	Apr. 30, 2014	Jul. 31, 2013	Jan. 31, 2014
Current exercise price of warrants	$ 0.03	$ 0.03
Time to expiration	3 years 7 months 6 days	3 years 6 months
Risk-free interest rate	0.91%	0.49%
Estimated volatility	82.00%	85.00%
Dividend		0.00%
Stock price at period end date	$ 0.035	$ 0.035
Additional Investment Rights
Underlying number of units of convertible preferred stock	2,500	1,225
Underlying number of units of warrants	83,333,334	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	9 months 11 days	10 months 16 days
Risk-free interest rate	0.10%	0.11%
Estimated volatility	52.00%	114.00%
Dividend	0.00%	0.00%
Stock price at period end date		$ 0.035	$ 0.035