Annual report pursuant to Section 13 and 15(d)

Compensation and Other Benefit Plans - Stock-based Compensation Expense (Details)

v3.20.1
Compensation and Other Benefit Plans - Stock-based Compensation Expense (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Share-based compensation expense    
Stock-based compensation expense $ 4,948 $ 3,902
Research and development    
Share-based compensation expense    
Stock-based compensation expense 204 369
General and administrative    
Share-based compensation expense    
Stock-based compensation expense $ 4,744 $ 3,533