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 |
| X | ||||||||||
- Definition Amount of expense for employee benefit and equity-based compensation. No definition available.
|
| X | ||||||||||
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|