Stockbased Compensation - Summary of Stock Option Activity (Detail) - $ / shares	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Schedule of Stock Based Compensation Details Stock Option Activities [Line Items]
Weighted average exercise price per share	$ 0.84	$ 0.20
Shares	25,429,000	7,114,250
Shares granted		0
Three Months Ended March [Member]
Schedule of Stock Based Compensation Details Stock Option Activities [Line Items]
Shares granted	8,682,000
Shares exercised	0	0
Shares forfeited	(490,000)	(559,250)
Shares	33,621,000	6,555,000
Weighted average exercise price per share, granted	$ 1.83
Weighted average exercise price per share, exercised	0	$ 0
Weighted average exercise price per share, forfeited	2.09	0.29
Weighted average exercise price per share	$ 1.08	$ 0.19