Compensation and Other Benefit Plans - Stock-based Compensation Expense (Details) - USD ($) $ in Thousands |
12 Months Ended | |
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Dec. 31, 2020 |
Dec. 31, 2019 |
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| Share-based compensation expense | ||
| Stock-based compensation expense | $ 3,961 | $ 4,948 |
| Research and development | ||
| Share-based compensation expense | ||
| Stock-based compensation expense | 204 | |
| General and administrative | ||
| Share-based compensation expense | ||
| Stock-based compensation expense | $ 3,961 | $ 4,744 |
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- Definition Amount of expense for award under share-based payment arrangement. Excludes amount capitalized. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- 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.
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