Stock Option Activity (Detail) (USD $)	3 Months Ended
	Apr. 30, 2013
Shares
Beginning balance	5,300,000
Granted	532,000
Exercised	0
Expired	0
Forfeited	0
Ending balance	5,832,000
Vested and exercisable	3,398,419
Weighted-Average Per Share Exercise Price
Beginning balance	$ 0.18
Granted	$ 0.37
Exercised	$ 0
Expired	$ 0
Forfeited	$ 0
Ending balance	$ 0.20
Vested and exercisable	$ 0.20
Weighted-Average Remaining Contractual Term (Years)
Balance	9 years 1 month 6 days
Granted	9 years 8 months 12 days
Exercised	0 years
Expired	0 years
Forfeited	0 years
Balance at end of period	9 years 1 month 6 days
Vested and exercisable	8 years 10 months 24 days
Aggregate Intrinsic Value
Beginning Balance	$ 0
Granted	0
Exercised	0
Expired	0
Forfeited	0
Balance at end of period	0
Vested and exercisable	$ 0