Common Stock Options and Warrants (Detail) - Information about stock options (USD $)	3 Months Ended
	Apr. 30, 2013
Range Of Price 0.02 [Member]
Options outstanding, Weighted Average Number Outstanding	4,500,000
Options Outstanding, Contractual Life	4 years 332 days
Options Outstanding, Weighted Average Exercise Price (in Dollars per share)	$ 0.02
Options Exercisable, Weighted Average Number Exercisable	2,250,000
Options Exercissble, Weighted Average Exercise Price (in Dollars per share)	$ 0.02
Range Of Price 0.05 [Member]
Options outstanding, Weighted Average Number Outstanding	2,000,000
Options Outstanding, Contractual Life	3 years 21 days
Options Outstanding, Weighted Average Exercise Price (in Dollars per share)	$ 0.05
Options Exercisable, Weighted Average Number Exercisable	2,000,000
Options Exercissble, Weighted Average Exercise Price (in Dollars per share)	$ 0.05
Range Of Price 0.06 [Member]
Options outstanding, Weighted Average Number Outstanding	5,650,000
Options Outstanding, Contractual Life	2 years 251 days
Options Outstanding, Weighted Average Exercise Price (in Dollars per share)	$ 0.06
Options Exercisable, Weighted Average Number Exercisable	5,650,000
Options Exercissble, Weighted Average Exercise Price (in Dollars per share)	$ 0.06
Range Of Price 0.08 [Member]
Options outstanding, Weighted Average Number Outstanding	500,000
Options Outstanding, Contractual Life	1 year 266 days
Options Outstanding, Weighted Average Exercise Price (in Dollars per share)	$ 0.08
Options Exercisable, Weighted Average Number Exercisable	500,000
Options Exercissble, Weighted Average Exercise Price (in Dollars per share)	$ 0.08
Range Of Price 0.30 [Member]
Options outstanding, Weighted Average Number Outstanding	100,000
Options Outstanding, Contractual Life	1 year 266 days
Options Outstanding, Weighted Average Exercise Price (in Dollars per share)	$ 0.30
Options Exercisable, Weighted Average Number Exercisable	100,000
Options Exercissble, Weighted Average Exercise Price (in Dollars per share)	$ 0.30
Range Of Price 0.60 [Member]
Options outstanding, Weighted Average Number Outstanding	2,000,000
Options Outstanding, Contractual Life	2 years 219 days
Options Outstanding, Weighted Average Exercise Price (in Dollars per share)	$ 0.60
Options Exercisable, Weighted Average Number Exercisable	2,000,000
Options Exercissble, Weighted Average Exercise Price (in Dollars per share)	$ 0.60