Stockholders' Equity - Summary of Stock Options Outstanding (Detail) (USD $)			3 Months Ended
	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2014 $ 1.00 - 5.00 [Member]	Mar. 31, 2014 $ 5.01 - 10.00 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Exercise Prices, minimum			$ 1.00	$ 5.01
Range of Exercise Prices, maximum			$ 5.00	$ 10.00
Number Outstanding	3,476,376		2,429,532	1,046,844
Weighted Average Remaining Contractual Life (Years)			5 years 7 months 21 days	4 years 4 months 13 days
Weighted Average Exercise Price			$ 3.13	$ 6.42
Aggregate Intrinsic Value	$ 15,034,087