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Prepaid Expenses and Other Current Assets - Schedule of Prepaid Expenses and Other Current Assets (Details) - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019
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Prepaid Expense And Other Assets Current [Abstract] |  |  |
Clinical trial expenses |  | $ 1,497 | $ 725
Insurance premiums |  | 845 | 589
Other | [1] | 328 | 445
Total prepaid expenses and other current assets |  | $ 2,670 | $ 1,759
[1] | 1Other consists of various prepaid expenses and other current assets, with no individual item accounting for more than 5% at December 31, 2020 and 2019.

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