Derivative Liability (Details) - USD ($)			1 Months Ended		3 Months Ended		6 Months Ended
	Nov. 23, 2015	Oct. 23, 2015	Nov. 23, 2015	Oct. 23, 2015	Jan. 31, 2016	Jan. 31, 2015	Jan. 31, 2016	Jan. 31, 2015	Nov. 30, 2015	Jul. 31, 2015	Jul. 10, 2012
Convertible Note And Derivative Liability [Line Items]
Common stock, shares issued					60,175,975		60,175,975			41,859,297
Derivative liability					$ 17,618,000		$ 17,618,000			$ 4,000
Volatility					96.60%			133.74%
Interest rate					0.92%			1.50%
Fair value of derivative liabilities in excess of proceeds					$ 859,000		1,867,000
Change in derivative liability					7,790,000	$ (5,000)	7,747,000	$ (4,000)
Bridge Loan [Member]
Convertible Note And Derivative Liability [Line Items]
Derivative liability					$ 10,000		$ 10,000
Share price					$ 1.20		$ 1.20
Warrants exercise price							$ 0.20
Volatility							82.32%
Interest rate							0.30%
Warrant Expiration							10 months 24 days
Shares issued											132,420
Warrants outstanding					9,709		9,709
Private Placement [Member]
Convertible Note And Derivative Liability [Line Items]
Warrants to purchase common stock shares						4,652,312		4,652,312	20,376,219
Common stock, shares issued	4,444,439	13,333,333	4,444,439	13,333,333		10,086,025		10,086,025
Share price	$ 0.45	$ 0.45	$ 0.45	$ 0.45
Proceeds from issuance of private placement	$ 2,000,000	$ 6,000,000	$ 2,000,000	$ 6,000,000				$ 7,493,000,000,000
Fair value of derivative liabilities in excess of proceeds			859,000	1,008,000
Private Placement [Member] | Derivative 1 [Member]
Convertible Note And Derivative Liability [Line Items]
Derivative liability		$ 7,008,000		$ 7,008,000	$ 13,229,000		$ 13,229,000
Private Placement [Member] | Derivative 2 [Member]
Convertible Note And Derivative Liability [Line Items]
Derivative liability	$ 2,859,000		$ 2,859,000		$ 4,379,000		$ 4,379,000
Private Placement [Member] | Warrant [Member]
Convertible Note And Derivative Liability [Line Items]
Common stock, shares issued					13,906		13,906
Warrants exercise price							$ 0.45
Five Year Warrants [Member] | Private Placement [Member]
Convertible Note And Derivative Liability [Line Items]
Warrants to purchase common stock shares	2,222,217	6,666,666	2,222,217	6,666,666
Warrants exercise period			5 years				5 years
Five Year Warrants [Member] | Private Placement [Member] | Derivative 1 [Member]
Convertible Note And Derivative Liability [Line Items]
Warrants exercise period							5 years
Share price					$ 1.20		$ 1.20
Warrants exercise price							$ 0.45
Volatility							90.00%
Interest rate							1.30%
Warrant Expiration							4 years 8 months 12 days
Five Year Warrants [Member] | Private Placement [Member] | Derivative 2 [Member]
Convertible Note And Derivative Liability [Line Items]
Warrants exercise period							5 years
Share price					1.20		$ 1.20
Warrants exercise price							$ 0.45
Volatility							90.00%
Interest rate							1.30%
Warrant Expiration							4 years 9 months 18 days
Six Month Warrants [Member] | Derivative 1 [Member]
Convertible Note And Derivative Liability [Line Items]
Warrants exercise period							6 months
Six Month Warrants [Member] | Private Placement [Member]
Convertible Note And Derivative Liability [Line Items]
Warrants to purchase common stock shares	2,820,670	8,666,666	2,820,670	8,666,666
Warrants exercise period			6 months				6 months
Six Month Warrants [Member] | Private Placement [Member] | Derivative 1 [Member]
Convertible Note And Derivative Liability [Line Items]
Share price					1.20		$ 1.20
Warrants exercise price							$ 0.45
Volatility							90.00%
Interest rate							0.30%
Warrant Expiration							2 months 12 days
Six Month Warrants [Member] | Private Placement [Member] | Derivative 2 [Member]
Convertible Note And Derivative Liability [Line Items]
Warrants exercise period							6 months
Share price					$ 1.20		$ 1.20
Warrants exercise price							$ 0.45
Volatility							90.00%
Interest rate							0.40%
Warrant Expiration							3 months 18 days