Quarterly report pursuant to Section 13 or 15(d)

Equity - Components of Stock Based Compensation (Details)

v3.19.3
Equity - Components of Stock Based Compensation (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2019
Sep. 30, 2018
Class of Stock        
Share-based compensation expense $ 489 $ 244 $ 1,155 $ 825
General and administrative        
Class of Stock        
Share-based compensation expense 430 207 1,003 709
Research and development        
Class of Stock        
Share-based compensation expense $ 59 $ 37 $ 152 $ 116