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Certain Financial Statement Caption Information (Tables) | 3 Months Ended
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Mar. 31, 2021
Certain Financial Statement Caption Information [Abstract] |
Schedule of Company's Short-Term Investments | The following table summarizes the Company’s short-term investments (in thousands):
|  | Maturity |  | Amortized |  |  | Unrealized |  |  | Unrealized |  |  | Estimated |
|  | (in years) |  | Cost |  |  | Gains |  |  | Losses |  |  | Fair Value |
March 31, 2021 |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. treasury securities |  | 1 or less |  | $ | 50,165 |  |  | $ | 5 |  |  | $ | - |  |  | $ | 50,170 |
U.S. treasury securities |  | >1 and <5 |  |  | 2,558 |  |  |  | - |  |  |  | (1 | ) |  |  | 2,557 |
Certificates of deposit |  | 1 or less |  |  | 490 |  |  |  | 1 |  |  |  | - |  |  |  | 491 |
Total |  |  |  | $ | 53,213 |  |  | $ | 6 |  |  | $ | (1 | ) |  | $ | 53,218 |
December 31, 2020 |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. treasury securities |  | 1 or less |  | $ | 56,218 |  |  | $ | 6 |  |  | $ | (4 | ) |  | $ | 56,220 |
Certificates of deposit |  | 1 or less |  |  | 1,955 |  |  |  | 6 |  |  |  | - |  |  |  | 1,961 |
Total |  |  |  | $ | 58,173 |  |  | $ | 12 |  |  | $ | (4 | ) |  | $ | 58,181 |
Schedule of Accrued Expenses | Accrued expenses consisted of the following (in thousands):
| March 31, |  |  | December 31, |
| 2021 |  |  | 2020 |
Accrued payroll and other employee benefits | $ | 1,104 |  |  | $ | 1,870 |
Clinical studies |  | 1,081 |  |  |  | 493 |
Other accruals |  | 235 |  |  |  | 307 |
Preclinical studies |  | 102 |  |  |  | 72 |
Accrued interest |  | 71 |  |  |  | 71 |
Total accrued expenses | $ | 2,593 |  |  | $ | 2,813 |

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