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Prepaid Expenses and Other Current Assets - Schedule of Prepaid Expenses and Other Current Assets (Details) - USD ($) $ in Thousands | Sep. 30, 2022 | Dec. 31, 2021
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Prepaid Expense and Other Assets, Current [Abstract] |  |
Clinical trial expenses | $ 1,630 | $ 1,630
Insurance premiums | 158 | 890
Professional services | 210 | 15
Other | 37 | 208
Total prepaid expenses and other current assets | $ 2,035 | $ 2,743

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