Common Stock Options and Warrants (Detail) - The Company issued stock options Activity (USD $)	12 Months Ended
	Jan. 31, 2013	Jan. 31, 2012	Jan. 31, 2011
Outstanding	10,250,000	13,450,000	15,000,000
Outstanding (in Dollars per share)	$ 0.17	$ 0.25	$ 0.25
Exercisable at January 31, 2013	10,250,000
Exercisable at January 31, 2013 (in Dollars per share)	$ 0.17
Issued	2,500,000	2,000,000
Issued (in Dollars per share)	$ 0.06	$ 0.05
Exercised		(300,000)
Exercised (in Dollars per share)		$ 0.10
Expired/Cancelled	(5,700,000)	(3,250,000)
Expired/Cancelled (in Dollars per share)	$ 0.31	$ 0.09