Quarterly report pursuant to Section 13 or 15(d)

Equity - Components of Stock Based Compensation (Details)

v3.19.1
Equity - Components of Stock Based Compensation (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Class of Stock    
Share-based compensation expense $ 348 $ 242
General and administrative    
Class of Stock    
Share-based compensation expense 302 209
Research and development    
Class of Stock    
Share-based compensation expense $ 46 $ 33