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Stock-Based Compensation (Tables) | 6 Months Ended
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Jun. 30, 2021
Share-based Payment Arrangement [Abstract] |
Stock-based compensation | Stock-based compensation expense for the three and six months ended June 30, 2021 and 2020 was as follows:
| Three months ended June 30, |  | Six Months Ended June 30,
| 2021 |  | 2020 |  | 2021 |  | 2020
Research and development | $ | 427 |  |  | $ | 14 |  |  | $ | 771 |  |  | $ | 15 |
General and administrative | 2,367 |  |  | 159 |  |  | 3,386 |  |  | 162 |
Total stock-based compensation | $ | 2,794 |  |  | $ | 173 |  |  | $ | 4,157 |  |  | $ | 177 |

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