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Accrued and Other Current Liabilities
 12 Months Ended
Dec. 31, 2015
Accrued and Other Current Liabilities  
Accrued and Other Current Liabilities
8.      Accrued and Other Current Liabilities
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Accrued and other current liabilities consisted of the following at December 31, 2014 and 2015 (in $000s):
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December 31,
 ​
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2014
 ​ ​
2015
 ​
Accrued research and development
 ​ ​ ​ $ 4,161 ​ ​ ​ ​ $ 3,284 ​ ​
Accrued legal and professional fees
 ​ ​ ​ ​ 303 ​ ​ ​ ​ ​ 291 ​ ​
Other current liabilities
 ​ ​ ​ ​ 162 ​ ​ ​ ​ ​ 163 ​ ​
​ ​ ​ ​ $ 4,626 ​ ​ ​ ​ $ 3,738 ​ ​