Collaborative Agreement Transaction Price

No definition available.

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Namespace Prefix:	mgnx_
Data Type:	xbrli:monetaryItemType
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Period Type:	instant

- Definition

Initial fee received from collaboration or license agreement.

+ References

No definition available.

+ Details

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Balance Type:	credit
Period Type:	duration

- Definition

Potential Commercial Milestone Payments Under Agreement

+ References

No definition available.

+ Details

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- Definition

Potential Development and Regulatory Milestone Payments Under Agreement

+ References

No definition available.

+ Details

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- Definition

Proceeds from Royalties, Percent

+ References

No definition available.

+ Details

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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

No definition available.

+ Details

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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))
-URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Represents the value established as the selling price of the significant unit of accounting used to allocate the consideration of the multiple-deliverable arrangement.

+ 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

+ Details

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- Details

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- Details

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Collaboration and Other Agreements - Incyte (Details) - Incyte Corporation - Incyte MGA0012 Agreement - USD ($) $ in Millions	1 Months Ended	3 Months Ended
	Oct. 31, 2017	Mar. 31, 2018	Dec. 31, 2017
Collaboration And Other Agreements [Line Items]
Non-refundable upfront payment			$ 150.0
Potential development and regulatory milestone payments under agreement	$ 420.0
Potential commercial milestone payments under agreement	330.0
Collaborative agreement transaction price	154.0
Licenses revenue	150.0	$ 2.5
Variable consideration recognized	$ 4.0
Maximum
Collaboration And Other Agreements [Line Items]
Proceeds from royalties (percent)	24.00%
Minimum
Collaboration And Other Agreements [Line Items]
Proceeds from royalties (percent)	15.00%