Stock-Based Payments - Summary of Stock-based Compensation Expense for Stock Options and Restricted Stock Units (Details) - USD ($) $ in Thousands |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2020 |
Dec. 31, 2019 |
Dec. 31, 2018 |
|
| Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items] | |||
| Stock-based compensation expense | $ 10,939 | $ 9,839 | $ 6,610 |
| Research and development | |||
| Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items] | |||
| Stock-based compensation expense | 4,732 | 3,472 | 2,412 |
| General and administrative | |||
| Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items] | |||
| Stock-based compensation expense | $ 6,207 | $ 6,367 | $ 4,198 |
| X | ||||||||||
- Definition Amount of expense for award under share-based payment arrangement. Excludes amount capitalized. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| 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
|