Accrued Expenses and Other Current Liabilities - Schedule of Accrued Expenses and Other Current Liabilities (Details) - USD ($) $ in Thousands |
Dec. 31, 2021 |
Dec. 31, 2020 |
|---|---|---|
| Accrued Expenses And Other Current Liabilities [Abstract] | ||
| Accrued external research and development | $ 4,031 | $ 3,136 |
| Accrued payroll and benefits | 2,603 | 1,500 |
| Accrued professional fees | 233 | 691 |
| Accrued interest | 17 | 437 |
| Accrued other | 46 | |
| Accrued expenses and other current liabilities | $ 6,884 | $ 5,810 |