Common Stock - Summary of Stock-Based Compensation (Details) - Stock Options - USD ($) $ in Thousands |
12 Months Ended | |
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Dec. 31, 2020 |
Dec. 31, 2019 |
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| Stock-based compensation | $ 4,388 | $ 2,300 |
| Research and Development | ||
| Stock-based compensation | 1,989 | 1,304 |
| General and Administrative Expense | ||
| Stock-based compensation | $ 2,399 | $ 996 |
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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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