Derivative Liability (Details) - USD ($)		3 Months Ended
	Oct. 23, 2015	Oct. 31, 2015	Oct. 31, 2014	Nov. 23, 2015	Jul. 31, 2015	Jul. 10, 2012
Convertible Note And Derivative Liability [Line Items]
Common stock, shares issued		55,211,380			41,859,297
Derivative liability		$ 6,969,000			$ 4,000
Volatility			133.74%
Interest rate			1.50%
Proceeds from issuance of private placement		2,000,000
Fair value of derivative liabilities in excess of proceeds		1,008,000
Change in derivative liability		$ 43,000	$ (1,000)
Bridge Loan [Member]
Convertible Note And Derivative Liability [Line Items]
Warrants exercise period		1 year 1 month 24 days
Derivative liability		$ 5,000
Share price		$ 0.75
Warrants exercise price		$ 0.20
Volatility		89.61%
Interest rate		0.34%
Shares issued						132,420
Warrants outstanding		9,709
Private Placement [Member]
Convertible Note And Derivative Liability [Line Items]
Warrants to purchase common stock shares	15,333,332		4,004,259
Common stock, shares issued	13,333,333		9,958,032
Derivative liability	$ 7,008,000	$ 6,964,000
Share price	$ 0.45
Warrants exercise price		$ 0.45	$ 0.75
Proceeds from issuance of private placement	$ 6,000,000		$ 7,490,000
Fair value of derivative liabilities in excess of proceeds	$ 1,008,000
Five Year Warrants [Member] | Private Placement [Member]
Convertible Note And Derivative Liability [Line Items]
Warrants to purchase common stock shares	6,666,666
Warrants exercise period		5 years	5 years
Share price		$ 0.75
Warrants exercise price		$ 0.45
Volatility		90.00%
Interest rate		1.50%
Six Month Warrants [Member] | Private Placement [Member]
Convertible Note And Derivative Liability [Line Items]
Warrants to purchase common stock shares	8,666,666			2,820,670
Warrants exercise period		6 months
Share price		$ 0.75
Warrants exercise price		$ 0.45
Volatility		90.00%
Interest rate		0.20%