Common Stock Options and Warrants (Detail) - Information about Stock Options (USD $)	6 Months Ended
	Jul. 31, 2012	Jan. 31, 2012
Weighted Average Exercise Price, Options Outstanding	$ 0.23	$ 0.25
Weighted Average Number Outstanding (in Shares)	14,250,000	13,450,000
Contractual Life	2 years 7 days
Weighted Average Number Exercisable (in Shares)	14,250,000
Weighted Average Exercise Price, Options Exercisable	$ 0.23
Range of Price 0.05 [Member]
Weighted Average Exercise Price, Options Outstanding	$ 0.05
Weighted Average Number Outstanding (in Shares)	2,000,000
Contractual Life	3 years 295 days
Weighted Average Number Exercisable (in Shares)	2,000,000
Weighted Average Exercise Price, Options Exercisable	$ 0.05
Range Of Price 0.06 [Member]
Weighted Average Exercise Price, Options Outstanding	$ 0.06
Weighted Average Number Outstanding (in Shares)	3,150,000
Contractual Life	2 years 175 days
Weighted Average Number Exercisable (in Shares)	3,150,000
Weighted Average Exercise Price, Options Exercisable	$ 0.06
Range Of Price 0.08 [Member]
Weighted Average Exercise Price, Options Outstanding	$ 0.08
Weighted Average Number Outstanding (in Shares)	500,000
Contractual Life	2 years 175 days
Weighted Average Number Exercisable (in Shares)	500,000
Weighted Average Exercise Price, Options Exercisable	$ 0.08
Range Of Price 0.30 [Member]
Weighted Average Exercise Price, Options Outstanding	$ 0.30
Weighted Average Number Outstanding (in Shares)	100,000
Contractual Life	2 years 175 days
Weighted Average Number Exercisable (in Shares)	100,000
Weighted Average Exercise Price, Options Exercisable	$ 0.30
Range Of Price 0.40 [Member]
Weighted Average Exercise Price, Options Outstanding	$ 0.40
Weighted Average Number Outstanding (in Shares)	4,000,000
Contractual Life	127 days
Weighted Average Number Exercisable (in Shares)	4,000,000
Weighted Average Exercise Price, Options Exercisable	$ 0.40
Range Of Price 0.60 [Member]
Weighted Average Exercise Price, Options Outstanding	$ 0.60
Weighted Average Number Outstanding (in Shares)	2,000,000
Contractual Life	3 years 127 days
Weighted Average Number Exercisable (in Shares)	2,000,000
Weighted Average Exercise Price, Options Exercisable	$ 0.60
Range Of Price 0.06 [Member]
Weighted Average Exercise Price, Options Outstanding	$ 0.06
Weighted Average Number Outstanding (in Shares)	2,500,000
Contractual Life	4 years 233 days
Weighted Average Number Exercisable (in Shares)	2,500,000
Weighted Average Exercise Price, Options Exercisable	$ 0.06