Quarterly report pursuant to Section 13 or 15(d)

Quarterly report pursuant to Section 13 or 15(d)

Equity - Summary of Stock Option Activity (Detail)

v3.10.0.1
Equity - Summary of Stock Option Activity (Detail)
6 Months Ended
Jun. 30, 2018
$ / shares
shares
Number of shares  
Stock options, beginning balance (in shares) | shares 6,342,526
Stock options, granted (in shares) | shares 2,168,602
Stock options, exercised (in shares) | shares 1,030,576
Stock options, canceled or expired (in shares) | shares 25,498
Stock options, ending balance (in shares) | shares 7,455,054
Stock options, exercisable, ending balance (in shares) | shares 2,958,222
Weighted average price  
Weighted average exercise price, beginning balance (in dollars per share) | $ / shares $ 6.51
Weighted average exercise price, granted (in dollars per share) | $ / shares 8.34
Weighted average exercise price, exercised (in dollars per share) | $ / shares 5.53
Weighted average exercise price, canceled or expired (in dollars per share) | $ / shares 8.72
Weighted average exercise price, ending balance (in dollars per share) | $ / shares 7.18
Weighted average exercise price, exercisable, ending balance (in dollars per share) | $ / shares $ 6.14