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Accrued Expenses and Other Current Liabilities (Tables) | 6 Months Ended
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Jun. 30, 2017
Payables and Accruals [Abstract] |
Schedule of Accrued Expenses and Other Current Liabilities | Accrued expenses and other current liabilities consist of the following (in thousands):
| June 30, 2017 |  | December 31, 2016
Clinical trial costs | $ | 899 |  |  | $ | 3,088 |
Professional fees | 660 |  |  | 229 |
Compensation and related benefits | 976 |  |  | 975 |
Interest expense | 99 |  |  | — |
Accrued expenses and other current liabilities | $ | 2,634 |  |  | $ | 4,292 |

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