Quarterly report pursuant to Section 13 or 15(d)

Basis of Presentation (Details 5)

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Basis of Presentation (Details 5) (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2012
Dec. 31, 2011
Summary of Property and equipment    
Property and equipment , Gross $ 5,526 $ 5,226
Less accumulated depreciation and amortization (4,882) (4,771)
Property and equipment, Total 644 455
Lab and office equipment [Member]
   
Summary of Property and equipment    
Property and equipment , Gross 4,392 4,110
Leasehold improvements [Member]
   
Summary of Property and equipment    
Property and equipment , Gross   62
Computer equipment and software [Member]
   
Summary of Property and equipment    
Property and equipment , Gross $ 1,134 $ 1,054