Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity - Stock-Based Compensation (Details)

v3.21.2
Stockholders' Equity - Stock-Based Compensation (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Total stock-based compensation expense $ 779 $ 725 $ 2,319 $ 2,095
Research and development        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Total stock-based compensation expense 161 157 480 462
General and administrative        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Total stock-based compensation expense $ 618 $ 568 $ 1,839 $ 1,633