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PREPAID EXPENSES AND OTHER CURRENT ASSETS
 3 Months Ended
Mar. 31, 2014
Prepaid Expenses And Other Current Assets [Abstract]  
PREPAID EXPENSES AND OTHER CURRENT ASSETS
4. PREPAID EXPENSES AND OTHER CURRENT ASSETS

 

The following is a summary of prepaid expenses and other current assets at December 31, 2013 and March 31, 2014 (in $000s):

 

    December 31,     March 31,  
    2013     2014  
Research and development tax credit receivable   $ 1,744     $ 2,329  
Prepayments     427       1,077  
Grant receivable     357       247  
Sales tax receivable     209       440  
Deposits     132       142  
Other current assets     519       483  
    $ 3,388     $ 4,718