Annual report pursuant to Section 13 and 15(d)

Stockholders' Equity - Summary of Stock Options Activity (Details)

v3.20.4
Stockholders' Equity - Summary of Stock Options Activity (Details) - $ / shares
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Class Of Stock [Line Items]        
Stock Options Outstanding, Beginning balance 980,884 1,127,336 1,836,426  
Stock Options, Exercised (18,626) (109,291) (708,319)  
Stock Options, Forfeited (6,779) (37,161) (771)  
Stock Options Outstanding, Ending balance 955,479 980,884 1,127,336 1,836,426
Stock Options, Vested and exercisable 955,479 929,825 851,039  
Stock Options, Vested and expected to vest 955,479 977,589 1,109,280  
Outstanding, Weighted-average exercise price, Beginning balance $ 35.24 $ 34.89 $ 30.77  
Weighted-average exercise price, Exercised 17.81 28.45 24.22  
Weighted-average exercise price, Forfeited 48.23 44.58 28.24  
Outstanding, Weighted-average exercise price, Ending balance 35.49 35.24 34.89 $ 30.77
Weighted-average exercise price, Vested and exercisable 35.49 34.73 32.12  
Weighted-average exercise price, Vested and expected to vest $ 35.49 $ 35.21 $ 34.75  
Remaining weighted-average contractual term, Outstanding 1 year 10 months 6 days 2 years 10 months 2 days 3 years 10 months 2 days 4 years 6 months 29 days
Remaining weighted-average contractual term, Vested and exercisable 1 year 10 months 6 days 2 years 9 months 21 days 3 years 9 months  
Remaining weighted-average contractual term, Vested and expected to vest 1 year 10 months 6 days 2 years 10 months 2 days 3 years 10 months 2 days  
Outstanding, Per share average intrinsic value $ 11.81 $ 34.07 $ 89.28 $ 88.31
Per share average intrinsic value, Vested and exercisable 11.81 34.64 92.05  
Per share average intrinsic value, Vested and expected to vest 11.81 34.11 89.42  
Minimum        
Class Of Stock [Line Items]        
Outstanding, Price per share, Beginning balance 0.75 0.75 0.60  
Price per share, Exercised 1.17 0.75 0.60  
Price per share, Forfeited 44.19 38.54 24.52  
Outstanding, Price per share, Ending balance 0.75 0.75 0.75 0.60
Price per share, Vested and exercisable 0.75 0.75 0.75  
Price per share, Vested and expected to vest 0.75 0.75 0.75  
Maximum        
Class Of Stock [Line Items]        
Outstanding, Price per share, Beginning balance 83.30 83.30 83.30  
Price per share, Exercised 44.19 58.95 58.95  
Price per share, Forfeited 56.72 58.95 44.19  
Outstanding, Price per share, Ending balance 83.30 83.30 83.30 $ 83.30
Price per share, Vested and exercisable 83.30 83.30 83.30  
Price per share, Vested and expected to vest $ 83.30 $ 83.30 $ 83.30