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ACCRUED AND OTHER CURRENT LIABILITIES (Tables)
6 Months Ended
Jun. 30, 2014
Accrued and Other Current Liabilities  
Schedule of accrued and other current liabilities

 

    December 31,     June 30,  
    2013     2014  
Accrued research and development   $ 3,435     $ 2,761  
Accrued legal and professional fees     265       183  
Other current liabilities     731       151  
    $ 4,431     $ 3,095