Warrants (Detail)	3 Months Ended
	Apr. 30, 2013
Class of Warrant or Right [Line Items]
Exercise Price	0.40
Warrants outstanding	3,011,000
Weighted average remaining contractual life	3 years 9 months
Warrants Exercisable	3,011,000
Weighted average exercise price	0.2818
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	3 years 3 months
Warrants Exercisable	1,250,000
Weighted average exercise price	0.1149
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	3 years 3 months
Warrants Exercisable	250,000
Weighted average exercise price	0.1149
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	3 years 3 months
Warrants Exercisable	500,000
Weighted average exercise price	0.4500
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	4 years 6 months
Warrants Exercisable	100,000
Weighted average exercise price	0.5000
Warrant Exercise Price Range Five 0.45000
Class of Warrant or Right [Line Items]
Exercise Price	0.45000
Warrants outstanding	735,000
Weighted average remaining contractual life	4 years 9 months 4 days
Warrants Exercisable	735,000
Weighted average exercise price	0.4500
Warrant Exercise Price Range Six 0.40000
Class of Warrant or Right [Line Items]
Exercise Price	0.40000
Warrants outstanding	176,000
Weighted average remaining contractual life	4 years 9 months 4 days
Warrants Exercisable	176,000
Weighted average exercise price	0.4000