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Accrued Expenses and Other Current Liabilities (Tables) | 12 Months Ended
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Dec. 31, 2018
Payables and Accruals [Abstract] |
Schedule of Accrued Expenses and Other Current Liabilities | Accrued expenses and other current liabilities consist of the following (in thousands):
| December 31, 2018 |  | December 31, 2017
Professional fees | $ | 540 |  |  | $ | 1,744 |
Compensation and related benefits | 675 |  |  | 566 |
Clinical trial costs | 858 |  |  | 51 |
Value-added tax | — |  |  | 426 |
Rebates and returns of former commercial products | 138 |  |  | 223 |
Other | 8 |  |  | 191 |
Accrued expenses and other current liabilities | $ | 2,219 |  |  | $ | 3,201 |

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