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Stock-Based Compensation - Schedule of Fair Value of Employee Stock Options (Details)
6 Months Ended
Jun. 30, 2017
2016 Employee Incentive Plan  
Share-based Compensation  
Expected volatility, Minimum 47.20%
Expected volatility, Maximum 59.30%
Risk-free interest rate, Minimum 2.00%
Risk-free interest rate, Maximum 2.10%
2016 Employee Incentive Plan | Minimum  
Share-based Compensation  
Expected term (in years) 5 years 9 months 18 days
2016 Employee Incentive Plan | Maximum  
Share-based Compensation  
Expected term (in years) 6 years 1 month 6 days
2016 Employee Stock Purchase Plan  
Share-based Compensation  
Expected volatility 49.50%
Risk-free interest rate 0.50%
Expected term (in years) 6 months