Stock-Based Compensation - Schedule of stock-based compensation expense (Details) - USD ($) $ in Thousands |
3 Months Ended | 9 Months Ended | ||
---|---|---|---|---|
Sep. 30, 2020 |
Sep. 30, 2019 |
Sep. 30, 2020 |
Sep. 30, 2019 |
|
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||||
Stock-based compensation expense | $ 312 | $ 143 | $ 629 | $ 297 |
Research and development | ||||
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||||
Stock-based compensation expense | 159 | 93 | 350 | 151 |
General and administrative | ||||
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||||
Stock-based compensation expense | $ 153 | $ 50 | $ 279 | $ 146 |