Summary of Significant Accounting Policies - Property and Equipment (Details)	12 Months Ended
Dec. 31, 2018
Computer equipment and software
Property and Equipment
Useful life	3 years
Office equipment and furniture
Property and Equipment
Useful life	5 years
Minimum \| Laboratory equipment
Property and Equipment
Useful life	5 years
Maximum \| Laboratory equipment
Property and Equipment
Useful life	15 years

Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

No definition available.

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration