Quarterly report pursuant to Section 13 or 15(d)

Basis of Presentation and Summary of Significant Accounting Policies - Fair Value Valuation Assumptions (Details)

v3.19.2
Basis of Presentation and Summary of Significant Accounting Policies - Fair Value Valuation Assumptions (Details)
3 Months Ended 6 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2019
Jun. 30, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]        
Risk-free interest rate (as a percent) 1.90% 2.80% 2.40% 2.80%
Dividend yield (as a percent) 0.00% 0.00% 0.00% 0.00%
Expected volatility (as a percent) 40.00% 36.00% 43.00% 34.00%
Expected term 5 years 10 months 24 days 5 years 9 months 18 days 5 years 2 months 12 days 5 years 8 months 12 days