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Accrued Liabilities and Other Current Liabilities
6 Months Ended
Jun. 30, 2011
Accrued Liabilities and Other Current Liabilities [Abstract]  
ACCRUED LIABILITIES AND OTHER CURRENT LIABILITIES
5. ACCRUED LIABILITIES AND OTHER CURRENT LIABILITIES
Accrued and other current liabilities consisted of the following:
                 
    December 31,     June 30,  
    2010     2011  
    ($000s)  
Accrued research and development
    2,793       3,343  
Other current liabilities
    1,339       1,116  
 
           
 
    4,132       4,459