Convertible Note and Derivative Liability (Narrative) (Details) (USD $)	3 Months Ended		6 Months Ended		12 Months Ended
	Jan. 31, 2014	Jan. 31, 2013	Jan. 31, 2014	Jan. 31, 2013	Jul. 31, 2012 item	Jul. 31, 2013	Sep. 17, 2012
Convertible Note And Derivative Liability [Line Items]
Aggregate cash consideration received					$ 1,200,000
Number of lenders					9
Amortization of debt discount			0	371,000
Amortization of deferred financing costs			0	215,000
Common Stock,Issued	25,808,128		25,808,128			12,569,503	4,341,615
Warrants liability	54,000		54,000		319,000	51,000
Change in fair value of derivative liability	1,000	(12,000)	59,000	(240,000)
Warrant [Member]
Convertible Note And Derivative Liability [Line Items]
Aggregate number of exercises			90,699
Common Stock,Issued	73,290		73,290
Notes [Member]
Convertible Note And Derivative Liability [Line Items]
Unsecured note principal amount		1,125,000		1,125,000	1,333,000	1,125,000
Bridge Loan [Member] | Warrant [Member]
Convertible Note And Derivative Liability [Line Items]
Shares issued					132,420
Aggregate number of exercises			90,699
Common Stock,Issued	73,290		73,290
Warrants outstanding	41,721		41,721
Change in fair value of derivative liability	$ 1,000		$ (59,000)