Common Stock Options and Warrants (Detail) - Information about Outstanding warrants (USD $)			3 Months Ended
	Apr. 30, 2013	Jan. 31, 2013	Apr. 30, 2013 Exercise Price 0.02 [Member]	Apr. 30, 2013 Exercise Price 0.02 [Member]	Apr. 30, 2013 Exercise Price 0.05 [Member]	Apr. 30, 2013 Exercise Price 0.25 [Member]
Warrants outstanding, Nember of Shares	9,689,000	8,814,000	1,000,000	6,814,000	1,000,000	875,000
Warrants outstanding, Remaining Contractual Life			2 years 251 days	4 years 124 days	2 years 51 days	3 years
Warrants outstanding, Exercise Price Times Number of Shares (in Dollars)			$ 20,000	$ 136,280	$ 50,000	$ 218,750
Warrants outstanding, Weighted Average Exercise Price (in Dollars per Item)	0.04	0.02	0.02	0.02	0.05	0.25