Common Stock Options and Warrants (Detail) - Stock options activity (USD $)	3 Months Ended
	Apr. 30, 2013	Jan. 31, 2013
Options Outstanding, Number of Shares	14,750,000	10,250,000
Options Outstanding, Weighted Average Exercise Price (in Dollars per share)	$ 0.12	$ 0.17
Exercisable at April 30, 2013	12,500,000
Exercisable at April 30, 2013 (in Dollars per share)	$ 0.14
Issued	4,500,000
Issued (in Dollars per share)	$ 0.02
Exercised
Exercised (in Dollars per share)
Expired/Cancelled
Expired/Cancelled (in Dollars per share)