Stockholders' Deficiency (Details) (USD $)	6 Months Ended		207 Months Ended
	Jan. 31, 2013	Jan. 31, 2012	Jan. 31, 2013
Issuance of common stock for cash warrant exercises (in shares)	24,155,457
Issuance of common stock for cashless warrant exercises	$ 2,362,616
Issuance of common stock for cashless warrant exercises (in shares)	29,184,675
Issuance of common stock for stock option exercises	86
Issuance of common stock for stock option exercises (in shares)	85,701
Common stock issued as employee compensation	0	11,783	4,011,938
Common Stock [Member]
Issuance of common stock on conversion of convertible preferred stock	58,038
Issuance of common stock on conversion of convertible preferred stock (in shares)	58,037,496
Issuance of common stock as make whole payments on convertible preferred stock	19,972
Issuance of common stock as make whole payments on convertible preferred stock (in shares)	19,972,102
Issuance of common stock for services	2,457
Issuance of common stock for services (in shares)	2,457,022
Issuance of common stock for cash warrant exercises	24,155
Issuance of common stock for cash warrant exercises (in shares)	24,155,457
Issuance of common stock for cashless warrant exercises	29,185
Issuance of common stock for cashless warrant exercises (in shares)	29,184,675
Issuance of common stock for stock option exercises	86
Issuance of common stock for stock option exercises (in shares)	85,701
Common stock issued as employee compensation	0
Total	133,893
Total (in shares)	133,892,453
Additional Paid-In Capital [Member]
Issuance of common stock on conversion of convertible preferred stock	(58,038)
Issuance of common stock as make whole payments on convertible preferred stock	584,828
Issuance of common stock for services	182,885
Issuance of common stock for cash warrant exercises	700,508
Issuance of common stock for cashless warrant exercises	2,333,431
Issuance of common stock for stock option exercises	0
Common stock issued as employee compensation	19,697
Total (in shares)	3,763,312
Change To Stockholder Equity [Member]
Issuance of common stock on conversion of convertible preferred stock	0
Issuance of common stock as make whole payments on convertible preferred stock	604,800
Issuance of common stock for services	185,342
Issuance of common stock for cash warrant exercises	724,664
Issuance of common stock for cashless warrant exercises	2,362,616
Issuance of common stock for stock option exercises	86
Common stock issued as employee compensation	$ 19,697
Total (in shares)	3,897,205