Quarterly report pursuant to Section 13 or 15(d)

Share-based Compensation (Details 1)

v3.19.1
Share-based Compensation (Details 1) - Employee Stock Option [Member]
3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Expected dividend yield
Expected stock volatility 68.35% 25.70%
Risk-free interest rate 2.44% 2.56%
Expected life 3 years 5 years