Annual report pursuant to Section 13 and 15(d)

Annual report pursuant to Section 13 and 15(d)

Stock-Based Compensation - Status of Our Stock Options (Detail)

v3.19.3.a.u2
Stock-Based Compensation - Status of Our Stock Options (Detail) - $ / shares
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Share-based Payment Arrangement [Abstract]      
Number of shares, outstanding 6,839,417 6,342,526 5,136,110
Granted 969,720 2,457,102 2,119,498
Number of shares, exercised (2,309,451) (1,570,211) (565,569)
Number of shares, forfeited (180,927) (390,000) (347,513)
Number of shares, outstanding 5,318,759 6,839,417 6,342,526
Number of shares, exercisable 2,261,999    
Weighted average exercise price, outstanding (in dollars per share) $ 7.63 $ 6.51 $ 5.76
Weighted average exercise price, granted (in dollars per share) 19.70 9.03 7.60
Weighted average exercise price, exercised (in dollars per share) 6.83 5.48 3.84
Weighted average exercise price, forfeited (in dollars per share) 13.34 7.15 6.12
Weighted average exercise price, outstanding (in dollars per share) 9.97 $ 7.63 $ 6.51
Weighted average exercise price, exercisable (in dollars per share) $ 7.48