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Prepaid Expenses and Other Current Assets | 12 Months Ended
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Dec. 31, 2022
Prepaid Expense and Other Assets, Current [Abstract] |
Prepaid Expenses and Other Current Assets | 4. Prepaid expenses and other current assets Prepaid expenses and other current assets consisted of the following:
|  | December 31, 2022 |  |  | December 31, 2021 |
Rent and deposits |  | $ | — |  |  | $ | 470 |
Research and development expenses |  |  | 2,084 |  |  |  | 858 |
Accounts receivable |  |  | 449 |  |  |  | 144 |
Insurance |  |  | 1,608 |  |  |  | 2,384 |
Other |  |  | 255 |  |  |  | 185 |
Total |  | $ | 4,396 |  |  | $ | 4,041 |

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