Quarterly report pursuant to Section 13 or 15(d)

Stock Options (Details)

v3.19.2
Stock Options (Details)
6 Months Ended
Jun. 30, 2019
USD ($)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Expected life of stock option grants 7 years
Dividends assumption
Minimum [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Risk-free interest rate 2.37%
Expected volatility of underlying stock 49.48%
Maximum [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Risk-free interest rate 2.66%
Expected volatility of underlying stock 49.65%