Annual report pursuant to Section 13 and 15(d)

Summary of Weighted Average Assumptions Used In Determining the Fair Value of Stock Options (Details)

v3.19.1
Summary of Weighted Average Assumptions Used In Determining the Fair Value of Stock Options (Details) - $ / shares
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Equity [Abstract]    
Exercise price $ 2.52 $ 2.01
Expected term in years 4 years 6 months 4 years 7 months 6 days
Expected volatility (annual) 40.00% 42.00%
Risk-free interest rate 2.00% 2.00%
Expected dividend yield (per share) 0.00% 0.00%