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Accrued and Other Current Liabilities (Details) - USD ($) $ in Thousands | Jun. 30, 2021 | Dec. 31, 2020
--- | --- | ---
Accrued and Other Current Liabilities |  |
Accrued research and development | $ 476 | $ 946
Accrued payroll and other employee benefits | 258 | 192
Deferred offering costs | 297 |
Other | 120 | 18
Total accrued and other current liabilities | $ 1,151 | $ 1,156

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