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Prepaid Expenses and Other Current Assets | 9 Months Ended
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Sep. 30, 2021
Prepaid Expense And Other Assets Current [Abstract] |
Prepaid Expenses and Other Current Assets | 5. Prepaid Expenses and Other Current Assets Prepaid expenses and other current assets consist of the following:
|  | September 30, 2021 |  |  | December 31, 2020 |
Refundable FDA filing fee (1) |  | $ | — |  |  | $ | 2,876 |
Short-term deposits |  |  | 2,293 |  |  |  | 2,360 |
Prepaid insurance |  |  | 954 |  |  |  | 415 |
Research and development tax credit receivable |  |  | 877 |  |  |  | 801 |
Interest receivable |  |  | 136 |  |  |  | — |
Other prepaid assets |  |  | 132 |  |  |  | 231 |
Prepaid research and development expenses |  |  | 51 |  |  |  | 157 |
Value added tax receivable |  |  | 14 |  |  |  | 64 |
Deferred financing expenses |  |  | 45 |  |  |  | — |
Total |  | $ | 4,502 |  |  | $ | 6,904 |
(1) FDA filing fee refund of $2,876 was received in January 2021 |  |  |  |  |  |  |  |

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