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ACCRUED LIABILITIES AND OTHER CURRENT LIABILITIES (Details) (USD $)
9 Months Ended
Sep. 30, 2012
Dec. 31, 2011
Dec. 31, 2010
Accrued and Other Current Liabilities      
Accrued research and development $ 3,335,000 $ 3,471,000 $ 2,793,000
Other current liabilities 792,000 712,000 961,000
Total 4,127,000 4,183,000 3,754,000
Reversals of pre-clinical expense accruals $ 400,000