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Accrued and Other Current Liabilities | 12 Months Ended
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Dec. 31, 2016
Accrued and Other Current Liabilities |
Accrued and Other Current Liabilities | 8. Accrued and Other Current Liabilities Accrued and other current liabilities consisted of the following at December 31, 2015 and 2016 (in thousands):
|  |  | December 31, |
|  |  | 2015 |  |  | 2016 |
Accrued research and development |  |  |  | $ | 3,284 |  |  |  |  | $ | 2,138 |  |
Accrued legal and professional fees |  |  |  |  | 291 |  |  |  |  |  | 194 |  |
Other current liabilities |  |  |  |  | 238 |  |  |  |  |  | 430 |  |
|  |  |  | $ | 3,813 |  |  |  |  | $ | 2,762 |  |

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