Annual report pursuant to Section 13 and 15(d)

Stockholders' Equity and Stock-Based Compensation (Details 6)

v3.19.1
Stockholders' Equity and Stock-Based Compensation (Details 6)
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Stockholders Equity And Stockbased Compensation Details 6Abstract    
Average risk-free interest rate 2.79% 2.15%
Average expected life- years 6 years 5 years 8 months 2 days
Expected volatility 90.11% 87.24%
Expected dividends 0.00% 0.00%