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Stockholders' Equity - Summary of Stock Option Activity and Weighted Average Exercise Prices (Details)
$ / shares in Units, shares in Thousands, $ in Thousands
 6 Months Ended 12 Months Ended
Jun. 30, 2021
USD ($)
$ / shares
shares
Dec. 31, 2020
USD ($)
$ / shares
shares
Options    
Beginning balance (in shares) | shares 4,332  
Granted (in shares) | shares 472  
Exercised (in shares) | shares (461)  
Cancelled or expired (in shares) | shares (88)  
Ending balance (in shares) | shares 4,255 4,332
Options vested and expected to vest (in shares) | shares 1,187  
Options exercisable at end of period (in shares) | shares 2,448  
Weighted Average Exercise Price    
Beginning balance (in dollars per share) | $ / shares $ 19.78  
Granted (in dollars per share) | $ / shares  
Exercised (in dollars per share) | $ / shares  
Cancelled or expired (in dollars per share) | $ / shares  
Ending balance (in dollars per share) | $ / shares 24.21 $ 19.78
Options vested and expected to vest (in dollars per share) | $ / shares 32.09  
Options exercisable at end of period (in dollars per share) | $ / shares $ 16.58  
Weighted Average Remaining Contractual Term (In years)    
Weighted average remaining contract term, Options outstanding 6 years 10 months 6 days 6 years 9 months 14 days
Weighted average remaining contract term, Options vested and expected to vest 8 years 3 months  
Weighted average remaining contract term, Options exercisable 5 years 7 months 28 days  
Aggregate Intrinsic Value    
Aggregate intrinsic value, Options outstanding | $ $ 166,339 $ 183,825
Aggregate intrinsic value, Options vested and expected to vest | $ 37,185  
Aggregate intrinsic value, Options exercisable | $ $ 114,235