Basis of Presentation and Summary of Significant Accounting Policies - Long-Lived Assets (Details)	12 Months Ended
	Dec. 31, 2016 USD ($)
Property, Plant and Equipment [Line Items]
Impairment of Long-Lived Assets Held-for-use	$ 0
Laboratory equipment
Property, Plant and Equipment [Line Items]
Estimated useful lives	5 years
Furniture And Office Equipment | Minimum
Property, Plant and Equipment [Line Items]
Estimated useful lives	3 years
Furniture And Office Equipment | Maximum
Property, Plant and Equipment [Line Items]
Estimated useful lives	5 years