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ACCRUED AND OTHER CURRENT LIABILITIES (Details) (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2014
Dec. 31, 2013
Accrued and Other Current Liabilities    
Accrued research and development $ 2,761 $ 3,435
Accrued legal and professional fees 183 265
Other current liabilities 151 731
Total $ 3,095 $ 4,431