Quarterly report pursuant to Section 13 or 15(d)

Equity - Components of Stock Based Compensation (Details)

v3.19.2
Equity - Components of Stock Based Compensation (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2019
Jun. 30, 2018
Class of Stock        
Share-based compensation expense $ 318 $ 339 $ 666 $ 581
General and administrative        
Class of Stock        
Share-based compensation expense 271 293 573 502
Research and development        
Class of Stock        
Share-based compensation expense $ 47 $ 46 $ 93 $ 79