Basis of Presentation and Summary of Significant Accounting Policies - Plant, Property, and Equipment (Details)	12 Months Ended
	Dec. 31, 2016
Laboratory equipment
Property, Plant and Equipment [Line Items]
Estimated useful life (years)	5 years
Computer equipment and software | Minimum
Property, Plant and Equipment [Line Items]
Estimated useful life (years)	3 years
Computer equipment and software | Maximum
Property, Plant and Equipment [Line Items]
Estimated useful life (years)	5 years
Office equipment and furniture
Property, Plant and Equipment [Line Items]
Estimated useful life (years)	5 years