Common Stock Options and Warrants (Detail) - Warrant for Purchase of Common Stock (USD $)	12 Months Ended
	Jan. 31, 2013	Jan. 31, 2012	Aug. 31, 2012	Jun. 19, 2012	Jan. 31, 2011	Jan. 31, 2007
Outstanding	8,814,000	3,766,666			6,626,486
Outstanding (in Dollars per Item)	0.02	0.12	0.02	0.05	0.12	0.04
Exercisable at January 31, 2013	8,814,000
Exercisable at January 31, 2013 (in Dollars per share)	$ 0.12
Issued	8,814,000
Issued (in Dollars per share)	$ 0.02
Expired/Cancelled	(3,766,666)	(2,859,820)
Expired/Cancelled (in Dollars per share)	$ 0.12	$ 0.12