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Property and Equipment (Details) (USD $)
In Thousands, unless otherwise specified
9 Months Ended
Sep. 30, 2014
Dec. 31, 2013
Components of Property and equipment    
Property and Equipment, Gross $ 404 $ 514
Accumulated depreciation and amortization (378) (485)
Property and equipment, net 26 29
Computer Equipment
   
Components of Property and equipment    
Estimated Life 3 years  
Property and Equipment, Gross 91 99
Lab Equipment
   
Components of Property and equipment    
Estimated Life 5 years  
Property and Equipment, Gross 142 142
Furniture and Fixtures
   
Components of Property and equipment    
Estimated Life 5 years  
Property and Equipment, Gross 89 89
Computer Software
   
Components of Property and equipment    
Estimated Life 3 years  
Property and Equipment, Gross 74 176
Leasehold Improvements
   
Components of Property and equipment    
Estimated Life Lesser of useful life or life of the lease  
Property and Equipment, Gross $ 8 $ 8