Equity - Summary of Stock Option Activity (Detail)	9 Months Ended
	Sep. 30, 2016 $ / shares shares
Equity [Abstract]
Stock options, beginning balance | shares	5,326,505
Stock options, granted | shares	2,542,527
Stock options, exercised | shares	2,395,015
Stock options, canceled or expired | shares	258,155
Stock options, ending balance | shares	5,215,862
Stock options, exercisable, ending balance | shares	1,162,128
Weighted average exercise price, beginning balance | $ / shares	$ 3.07
Weighted average exercise price, granted | $ / shares	7.10
Weighted average exercise price, exercised | $ / shares	1.61
Weighted average exercise price, canceled or expired | $ / shares	3.32
Weighted average exercise price, ending balance | $ / shares	5.67
Weighted average exercise price, exercisable, ending balance | $ / shares	$ 3.74