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Collaboration and Other Agreements Collaboration and Other Agreements, Incyte Corporation (Details) - Incyte MGA012 Agreement - Incyte Corporation (Incyte) - USD ($) $ in Millions	1 Months Ended	3 Months Ended	12 Months Ended
	Oct. 31, 2017	Dec. 31, 2017	Dec. 31, 2017
Collaboration and Other Agreements [Line Items]
Non-refundable upfront payment		$ 150.0	$ 150.0
Clinical trial activities selling price amount	$ 4.0
Recognized revenue under agreement			151.1
Clinical trial activities performed, revenue recognized			$ 1.1
Maximum
Collaboration and Other Agreements [Line Items]
Potential development and regulatory milestone payments	420.0
Potential commercial milestone payments	$ 330.0
Potential proceeds from royalties percent	24.00%
Minimum
Collaboration and Other Agreements [Line Items]
Potential proceeds from royalties percent	15.00%

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- Definition

Initial fee received from collaboration or license agreement.

+ References

No definition available.

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- Definition

Potential Commercial Milestone Payments Under Agreement

+ References

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- Definition

Potential Development and Regulatory Milestone Payments Under Agreement

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+ References

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

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- Definition

Revenue earned during the period relating to consideration received from another party for the right to use, but not own, certain of the entity's intangible assets. Licensing arrangements include, but are not limited to, rights to use a patent, copyright, technology, manufacturing process, software or trademark. Licensing fees are generally, but not always, fixed as to amount and not dependent upon the revenue generated by the licensing party. An entity may receive licensing fees for licenses that also generate royalty payments to the entity.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.1(e))
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- Definition

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+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 605
-SubTopic 25
-Section 50
-Paragraph 2
-Subparagraph (e)
-URI http://asc.fasb.org/extlink&oid=68059916&loc=SL6750900-111635

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