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Stockholders' Equity - Schedule of Exercise Prices And Weighted-average Remaining Contractual Lives For Options Outstanding (Details)
 12 Months Ended
Dec. 31, 2020
$ / shares
shares
Options Outstanding (in shares) | shares 18,912,529
Weighted- Average Remaining Contractual Life (Year) 7 years 2 months 15 days
Weighted- Average Exercise Price (in dollars per share) $ 19.59
Options Exercisable (in shares) | shares 10,237,202
Weighted- Average Exercise Price of Options Exercisable $ 18.74
Exercise Price Range 1  
Options Outstanding (in shares) | shares 2,700,473
Range of Exercise Prices, Lower Limit (in dollars per share) $ 5.20
Range of Exercise Prices, Upper Limit (in dollars per share) $ 13.00
Weighted- Average Remaining Contractual Life (Year) 3 years 11 months 19 days
Weighted- Average Exercise Price (in dollars per share) $ 10.14
Options Exercisable (in shares) | shares 2,691,327
Weighted- Average Exercise Price of Options Exercisable $ 10.14
Exercise Price Range 2  
Options Outstanding (in shares) | shares 800,371
Range of Exercise Prices, Lower Limit (in dollars per share) $ 13.05
Range of Exercise Prices, Upper Limit (in dollars per share) $ 15.55
Weighted- Average Remaining Contractual Life (Year) 6 years 1 month 17 days
Weighted- Average Exercise Price (in dollars per share) $ 14.31
Options Exercisable (in shares) | shares 655,173
Weighted- Average Exercise Price of Options Exercisable $ 14.22
Exercise Price Range 3  
Options Outstanding (in shares) | shares 3,582,407
Exercise Prices $ 15.72
Weighted- Average Remaining Contractual Life (Year) 9 years 9 months
Weighted- Average Exercise Price (in dollars per share) $ 15.72
Options Exercisable (in shares) | shares 149,197
Weighted- Average Exercise Price of Options Exercisable $ 15.72
Exercise Price Range 4  
Options Outstanding (in shares) | shares 2,838,033
Range of Exercise Prices, Lower Limit (in dollars per share) $ 15.78
Range of Exercise Prices, Upper Limit (in dollars per share) $ 17.89
Weighted- Average Remaining Contractual Life (Year) 6 years 1 month 6 days
Weighted- Average Exercise Price (in dollars per share) $ 16.87
Options Exercisable (in shares) | shares 2,348,090
Weighted- Average Exercise Price of Options Exercisable $ 16.84
Exercise Price Range 5  
Options Outstanding (in shares) | shares 3,688,255
Range of Exercise Prices, Lower Limit (in dollars per share) $ 18.00
Range of Exercise Prices, Upper Limit (in dollars per share) $ 24.97
Weighted- Average Remaining Contractual Life (Year) 7 years 1 month 24 days
Weighted- Average Exercise Price (in dollars per share) $ 22.97
Options Exercisable (in shares) | shares 2,036,430
Weighted- Average Exercise Price of Options Exercisable $ 23.10
Exercise Price Range 6  
Options Outstanding (in shares) | shares 3,498,912
Exercise Prices $ 25.02
Weighted- Average Remaining Contractual Life (Year) 8 years 7 months 17 days
Weighted- Average Exercise Price (in dollars per share) $ 25.02
Options Exercisable (in shares) | shares 1,010,859
Weighted- Average Exercise Price of Options Exercisable $ 25.02
Exercise Price Range 7  
Options Outstanding (in shares) | shares 1,804,078
Range of Exercise Prices, Lower Limit (in dollars per share) $ 25.06
Range of Exercise Prices, Upper Limit (in dollars per share) $ 39.00
Weighted- Average Remaining Contractual Life (Year) 6 years 7 months 20 days
Weighted- Average Exercise Price (in dollars per share) $ 30.58
Options Exercisable (in shares) | shares 1,346,126
Weighted- Average Exercise Price of Options Exercisable $ 30.43