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PROPERTY AND EQUIPMENT (Tables)
 12 Months Ended
Dec. 31, 2013
PROPERTY AND EQUIPMENT  
Schedule of property and equipment

Property and equipment consists of the following (in thousands):

 
   December 31,
2013		   December 31,
2012		  

Furniture and office equipment

   $ 3,547   $ 2,169  

Laboratory equipment

     5,151     4,623  

Leasehold improvements

     6,045     9,325  

Construction in progress

     —     196  
           
​ ​ ​ ​ ​ ​ ​ ​

 

     14,743     16,313  

Less: Accumulated depreciation and amortization

     (6,403 )   (8,076 )
           
​ ​ ​ ​ ​ ​ ​ ​

Property and equipment, net

   $ 8,340   $ 8,237  
           
​ ​ ​ ​ ​ ​ ​ ​
​ ​ ​ ​ ​ ​ ​ ​