Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation - Fair Value of Stock Options Granted (Details)

v3.19.3
Stock-Based Compensation - Fair Value of Stock Options Granted (Details)
3 Months Ended 9 Months Ended
Sep. 30, 2018
Sep. 30, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]    
Weighted average risk-free rate   2.51%
Expected dividend yield 0.00% 0.00%
Weighted average expected life (years)   6 years 29 days
Weighted average volatility   56.87%