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ACCRUED AND OTHER CURRENT LIABILITIES (Details) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2013
Dec. 31, 2012
ACCRUED AND OTHER CURRENT LIABILITIES    
Accrued research and development $ 5,645 $ 3,623
Accrued legal and professional fees 215 1,118
Other current liabilities 424 860
Total $ 6,284 $ 5,601