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Cash and Cash Equivalents (Tables)
 3 Months Ended
Mar. 31, 2011
Cash and Cash Equivalents (Tables) [Abstract]  
Cash and cash equivalents
                 
         March 31,
2011		     December 31,
2010		  
    (unaudited)          
Cash
    923       560  
Short-term investments
    10,348       7,024  
 
           
 
    11,271       7,584