Quarterly report pursuant to Section 13 or 15(d)

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

v3.19.1
Basis of Presentation and Summary of Significant Accounting Policies - Fair Value Valuation Assumptions (Details)
3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]    
Risk-free interest rate (as a percent) 2.50% 2.70%
Dividend yield (as a percent) 0.00% 0.00%
Expected volatility (as a percent) 44.00% 33.00%
Expected term 5 years 1 month 6 days 5 years 8 months 12 days