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Stockholders' Equity and Employee Benefit Plans - Summary of Estimated Fair Value of Stock Options and ESPP (Details) - $ / shares
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Dividend yield 0.00%    
At-the-Money Stock Option      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Risk-free interest rate, minimum 1.50% 2.70%  
Risk-free interest rate, maximum 2.50% 3.00%  
Volatility, minimum 44.00% 43.00%  
Volatility, maximum 46.00% 60.00%  
Dividend yield 0.00% 0.00%  
At-the-Money Stock Option | Minimum      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Expected life (in years) 5 years 2 months 12 days 5 years 9 months 18 days  
Fair value of common stock $ 12.35 $ 12.00  
At-the-Money Stock Option | Maximum      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Expected life (in years) 6 years 1 month 6 days 6 years 1 month 6 days  
Fair value of common stock $ 18.41 $ 13.65  
Out-of-the-Money Stock Option      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Risk-free interest rate, minimum     2.30%
Risk-free interest rate, maximum     2.40%
Volatility     50.00%
Dividend yield     0.00%
Out-of-the-Money Stock Option | Minimum      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Expected life (in years)     5 years 8 months 12 days
Fair value of common stock     $ 11.84
Out-of-the-Money Stock Option | Maximum      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Expected life (in years)     6 years 1 month 6 days
Fair value of common stock     $ 12.33