Quarterly report pursuant to Section 13 or 15(d)

Equity - Components of Stock Based Compensation (Details)

v3.10.0.1
Equity - Components of Stock Based Compensation (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Class of Stock [Line Items]        
Share-based compensation expense $ 244 $ 266 $ 825 $ 487
General and administrative        
Class of Stock [Line Items]        
Share-based compensation expense 207 264 709 481
Research and development        
Class of Stock [Line Items]        
Share-based compensation expense $ 37 $ 2 $ 116 $ 6