Summary of Significant Accounting Policies - Revenue Recognition - Additional Information (Details)	3 Months Ended
Mar. 31, 2018
Products and Services Revenues
Disaggregation of Revenue [Line Items]
Typical payment terms	30 days
Collaboration and licensing agreements
Disaggregation of Revenue [Line Items]
Typical required notice period for voluntary termination of collaboration agreement	90 days

Description of payment terms in contract with customer. Includes, but is not limited to, timing of payment, existence of financing component, variability of consideration and constraint on variable consideration.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 12
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=82913847&loc=SL49130554-203045

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