XML 77 R64.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Subsequent Event (Details) - Collaboration And License Agreement - Genentech - Subsequent Events $ in Millions | 1 Months Ended
--- | ---
Feb. 28, 2019 USD ($)
Collaboration research and licensing agreements |
Nonrefundable upfront payment | $ 120
Research license term | 2 years
XmAb24306 |
Collaboration research and licensing agreements |
Percentage of profits on net sales of the product | 45.00%
Collaboration Product Which Advances To Phase 1 Clinical Trials |
Collaboration research and licensing agreements |
Potential milestone payment | $ 20
Collaboration Product Which Advances To Phase 3 Clinical Trials |
Collaboration research and licensing agreements |
Potential milestone payment | $ 160

X
- 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
Name: | us-gaap_CollaborativeArrangementsAndNoncollaborativeArrangementTransactionsLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the percentage of profit on net sales of the product, if the company elects to participate in development. + References No definition available. + Details
Name: | xncr_CollaborativeAgreementPercentageOfProfitOnNetSales
Namespace Prefix: | xncr_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the amount of nonrefundable upfront fees as provided under the collaboration agreement. + References No definition available. + Details
Name: | xncr_CollaborativeArrangementNonrefundableUpfrontFees
Namespace Prefix: | xncr_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Represents the research license term under the collaborative agreement. + References No definition available. + Details
Name: | xncr_CollaborativeArrangementResearchLicenseTerm
Namespace Prefix: | xncr_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the amount of consideration that will be recognized upon full completion of milestones set forth in a collaborative agreement between two parties. + References No definition available. + Details
Name: | xncr_RevenueRecognitionMilestoneMethodPending
Namespace Prefix: | xncr_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | us-gaap_TypeOfArrangementAxis=xncr_CollaborationAndLicenseAgreementMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_CounterpartyNameAxis=xncr_GenentechIncMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ProductOrServiceAxis=xncr_Xmab24306ProductMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | xncr_CollaborationAndLicensingProgramsAxis=xncr_CollaborationProductWhichAdvancesToPhase1ClinicalTrialsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | xncr_CollaborationAndLicensingProgramsAxis=xncr_CollaborationProductWhichAdvancesToPhase3ClinicalTrialsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |