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PROPERTY AND EQUIPMENT (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2013
Dec. 31, 2012
PROPERTY AND EQUIPMENT    
Property and equipment, gross $ 1,284 $ 13,451
Less accumulated depreciation and amortization (1,192) (12,477)
Property and equipment, net 92 974
Furniture and computer equipment
   
PROPERTY AND EQUIPMENT    
Property and equipment, gross 1,092 2,816
Lab equipment
   
PROPERTY AND EQUIPMENT    
Property and equipment, gross 118 7,731
Leasehold improvements
   
PROPERTY AND EQUIPMENT    
Property and equipment, gross $ 74 $ 2,904