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Accrued Expenses (Tables) | 6 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2018 | Dec. 31, 2017
Payables and Accruals [Abstract] |  |
Schedule of accrued expenses | Accrued expenses consist of the following:
(in thousands) |  | June 30, 2018 |  |  | December 31, 2017 |
Compensation, excluding taxes |  | $ | 1,573 |  |  | $ | 869 |
Clinical trial expenses |  |  | 2,304 |  |  |  | 1,124 |
Professional fees |  |  | 314 |  |  |  | 221 |
Short-term portion of lease restructuring |  |  | 193 |  |  |  | 209 |
Other1 |  |  | 836 |  |  |  | 985 |
Total accrued expenses |  | $ | 5,220 |  |  | $ | 3,408 |
| 1 | Other consists of various accrued expenses, with no individual item accounting for more than 5% of current liabilities at June 30, 2018 and December 31, 2017.
| Current accrued expenses include the following:
(in thousands) |  | December 31, 2017 |  |  | December 31, 2016 |
Clinical trial expenses |  | $ | 869 |  |  | $ | 1,365 |
Compensation, excluding taxes |  |  | 1,124 |  |  |  | 933 |
Professional fees |  |  | 221 |  |  |  | 286 |
Short-term portion of lease restructuring |  |  | 209 |  |  |  | 216 |
Other1 |  |  | 985 |  |  |  | 607 |
Total accrued expenses |  | $ | 3,408 |  |  | $ | 3,407 |
1 | Other consists of various accrued expenses, with no individual item accounting for more than 5% of current liabilities at December 31, 2017 and 2016.

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