Warrants (Detail)	9 Months Ended
	Oct. 31, 2013
Class of Warrant or Right [Line Items]
Warrants outstanding	3,145,000
Weighted average remaining contractual life	3 years 3 months 14 days
Warrants exercisable	3,145,000
Weighted average exercise price	0.2882
Warrant Exercise Price Range One 0.11485
Class of Warrant or Right [Line Items]
Exercise Price	0.11485
Warrants outstanding	1,250,000
Weighted average remaining contractual life	2 years 9 months
Warrants exercisable	1,250,000
Weighted average exercise price	0.1149
Expiration date	Jul. 31, 2016
Warrant Exercise Price Range Two 0.11485
Class of Warrant or Right [Line Items]
Exercise Price	0.11485
Warrants outstanding	250,000
Weighted average remaining contractual life	2 years 9 months
Warrants exercisable	250,000
Weighted average exercise price	0.1149
Expiration date	Jul. 31, 2016
Warrant Exercise Price Range Three 0.45000
Class of Warrant or Right [Line Items]
Exercise Price	0.45000
Warrants outstanding	500,000
Weighted average remaining contractual life	2 years 9 months
Warrants exercisable	500,000
Weighted average exercise price	0.4500
Expiration date	Jul. 31, 2016
Warrant Exercise Price Range Four 0.50000
Class of Warrant or Right [Line Items]
Exercise Price	0.50000
Warrants outstanding	100,000
Weighted average remaining contractual life	3 years 11 months 26 days
Warrants exercisable	100,000
Weighted average exercise price	0.5000
Expiration date	Oct. 28, 2017
Warrant Exercise Price Range Five 0.45000
Class of Warrant or Right [Line Items]
Exercise Price	0.45000
Warrants outstanding	825,000
Weighted average remaining contractual life	4 years 3 months
Warrants exercisable	825,000
Weighted average exercise price	0.4500
Expiration date	Jan. 30, 2018
Warrant Exercise Price Range Six 0.40000
Class of Warrant or Right [Line Items]
Exercise Price	0.40000
Warrants outstanding	220,000
Weighted average remaining contractual life	4 years 3 months
Warrants exercisable	220,000
Weighted average exercise price	0.4000
Expiration date	Jan. 31, 2018