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Accrued Expenses | 12 Months Ended
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Dec. 31, 2017
Accrued Expenses |
Accrued Expenses | (8) Accrued Expenses Accrued expenses include the following:
|  | December 31, 2017 |  | December 31, 2016 |
|  | (In thousands) |
Accrued Payroll and Employee Benefits |  | $ | 6,348 |  | $ | 7,132 |
Accrued Research and Development Contract Costs |  |  | 11,399 |  |  | 17,742 |
Accrued Professional Fees |  |  | 1,408 |  |  | 1,146 |
Other Accrued Expenses |  |  | 300 |  |  | 2,637 |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
|  | $ | 19,455 |  | $ | 28,657 |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​

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