Summary of Significant Accounting Policies (Plant, Property, and Equipment) (Details)	12 Months Ended
	Dec. 31, 2013
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