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)

v3.20.4
Stock-Based Compensation - Status of Our Stock Options (Detail) - $ / shares
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Number of Shares      
Number of shares, outstanding 5,318,759 6,839,417 6,342,526
Number of shares, granted 845,120 969,720 2,457,102
Number of shares, exercised (2,310,934) (2,309,451) (1,570,211)
Number of shares, forfeited (67,004) (180,927) (390,000)
Number of shares, outstanding 3,785,941 5,318,759 6,839,417
Number of shares, exercisable 1,622,132    
Weighted Average Exercise Price      
Weighted average exercise price, outstanding (in dollars per share) $ 9.97 $ 7.63 $ 6.51
Weighted average exercise price, granted (in dollars per share) 28.33 19.70 9.03
Weighted average exercise price, exercised (in dollars per share) 7.96 6.83 5.48
Weighted average exercise price, forfeited (in dollars per share) 16.37 13.34 7.15
Weighted average exercise price, outstanding (in dollars per share) 15.21 $ 9.97 $ 7.63
Weighted average exercise price, exercisable (in dollars per share) $ 9.53