Stock Option Activity (Detail) (USD $)	1 Months Ended		3 Months Ended
	Jan. 31, 2014	Mar. 31, 2014	Mar. 31, 2014 Stock Option
Number of Shares Issuable
Balance, Beginning		7,491,196	7,502,421
Granted			175,000
Exercised	(107,461)		(23,693)
Cancelled			(162,532)
Balance, Ending		7,491,196	7,491,196
Weighted-Average Exercise Price
Balance, Beginning		$ 1.00	$ 1.00
Granted			$ 0.54
Exercised			$ 0.88
Cancelled			$ 0.88
Balance, Ending		$ 1.00	$ 1.00