Quarterly report pursuant to Section 13 or 15(d)

Stock Plans - Stock-based compensation expense (Details)

v3.22.2
Stock Plans - Stock-based compensation expense (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2022
Jun. 30, 2021
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost        
Total stock-based compensation $ 217 $ 447 $ 443 $ 695
Research and development        
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost        
Total stock-based compensation 123 214 246 334
General and administrative        
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost        
Total stock-based compensation $ 94 $ 233 $ 197 $ 361