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ACCRUED AND OTHER CURRENT LIABILITIES (Details) - USD ($)
$ in Thousands
Sep. 30, 2015
Dec. 31, 2014
Payables And Accruals [Abstract]    
Accrued research and development $ 3,210 $ 4,161
Accrued legal and professional fees 248 303
Other current liabilities 114 162
Total $ 3,572 $ 4,626