Annual report pursuant to Section 13 and 15(d)

Summary of Significant Accounting Policies (Plant, Property, and Equipment) (Details)

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Summary of Significant Accounting Policies (Plant, Property, and Equipment) (Details)
12 Months Ended
Dec. 31, 2012
Laboratory equipment [Member]
 
Property, Plant and Equipment [Line Items]  
Estimated useful life (years) 5 years
Computer equipment and software [Member] | Minimum [Member]
 
Property, Plant and Equipment [Line Items]  
Estimated useful life (years) 3 years
Computer equipment and software [Member] | Maximum [Member]
 
Property, Plant and Equipment [Line Items]  
Estimated useful life (years) 5 years
Office equipment and furniture [Member]
 
Property, Plant and Equipment [Line Items]  
Estimated useful life (years) 5 years