XML 83 R42.htm IDEA: XBRL DOCUMENT
v3.25.4

Akeso License and Collaboration Agreement (Details) - USD ($) $ / shares in Units, $ in Thousands |  | 1 Months Ended | 3 Months Ended | 12 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | --- | ---
Mar. 06, 2023 | Jan. 31, 2023 | Sep. 30, 2024 | Dec. 31, 2025 | Dec. 31, 2024 | Dec. 31, 2023 | Jun. 03, 2024 | May 13, 2024 | Apr. 27, 2023
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |  |  |  |  |  |  |
Common stock par value (in dollars per share) |  | $ 0.01 |  | $ 0.01 | $ 0.01 |  |  | $ 0.01 | $ 0.01
Payments to Akeso for upfront milestone payments |  |  |  | $ 0 | $ 15,007 | $ 475,015 |  |  |
Acquired in-process research and development expense |  |  |  | $ 0 | $ 15,007 | 520,915 |  |  |
Collaborative arrangement, transaction with party to collaborative arrangement |  |  |  |  |  |  |  |  |
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |  |  |  |  |  |  |
Collaborative arrangement, upfront payment |  | $ 500,000 |  |  |  |  |  |  |
Cash payment for collaborative arrangement, upfront payment |  |  |  |  |  | 474,900 |  |  |
Payments to Akeso for upfront milestone payments |  |  | $ 15,000 |  |  |  |  |  |
Additional potential commercial milestone payments |  |  |  |  |  |  | $ 55,000 |  |
Collaborative arrangement, direct transaction costs |  |  |  |  |  | $ 115 |  |  |
Collaborative arrangement, additional potential milestone payments |  |  |  |  |  |  | 4,555,000 |  |
Collaborative arrangement, potential regulatory milestone payments |  |  |  |  |  |  | 1,050,000 |  |
Collaborative arrangement, potential commercial milestone payments |  |  |  |  |  |  | $ 3,505,000 |  |
Collaborative arrangement, transaction with party to collaborative arrangement, upfront payment one |  |  |  |  |  |  |  |  |
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |  |  |  |  |  |  |
Cash payment for collaborative arrangement, upfront payment |  | $ 274,900 |  |  |  |  |  |  |
Collaborative arrangement, common stock issued in lieu of cash upfront payment (in shares) |  | 10,000,000 |  |  |  | 10,000,000 |  |  |
Collaborative arrangement, upfront payment, paid in shares |  | $ 25,100 |  |  |  |  |  |  |
Issuance of common stock in lieu of cash for Akeso upfront payment |  |  |  |  |  | $ 45,900 |  |  |
Collaborative arrangement, transaction with party to collaborative arrangement, upfront payment two |  |  |  |  |  |  |  |  |
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |  |  |  |  |  |  |
Cash payment for collaborative arrangement, upfront payment | $ 200,000 |  |  |  |  |  |  |  |

X
- Definition Acquired-In-Process Research And Development Expense + References No definition available. + Details
Name: | smmt_AcquiredInProcessResearchAndDevelopmentExpense
Namespace Prefix: | smmt_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Cash payment For Collaborative Arrangement, Upfront Payment + References No definition available. + Details
Name: | smmt_CashPaymentForCollaborativeArrangementUpfrontPayment
Namespace Prefix: | smmt_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Collaborative Arrangement, Rights And Obligations, Additional Potential Commercial Milestone Payments + References No definition available. + Details
Name: | smmt_CollaborativeArrangementRightsAndObligationsAdditionalPotentialCommercialMilestonePayments
Namespace Prefix: | smmt_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Collaborative Arrangement, Rights And Obligations, Direct Transaction Costs + References No definition available. + Details
Name: | smmt_CollaborativeArrangementRightsAndObligationsDirectTransactionCosts
Namespace Prefix: | smmt_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Collaborative Arrangement, Rights And Obligations, Maximum Aggregate Milestone Payments + References No definition available. + Details
Name: | smmt_CollaborativeArrangementRightsAndObligationsMaximumAggregateMilestonePayments
Namespace Prefix: | smmt_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Collaborative Arrangement, Rights And Obligations, Potential Commercial Milestone Payments + References No definition available. + Details
Name: | smmt_CollaborativeArrangementRightsAndObligationsPotentialCommercialMilestonePayments
Namespace Prefix: | smmt_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Collaborative Arrangement, Rights And Obligations, Potential Regulatory Milestone Payments + References No definition available. + Details
Name: | smmt_CollaborativeArrangementRightsAndObligationsPotentialRegulatoryMilestonePayments
Namespace Prefix: | smmt_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Collaborative Arrangement, Rights And Obligations, Upfront Payment + References No definition available. + Details
Name: | smmt_CollaborativeArrangementRightsAndObligationsUpfrontPayment
Namespace Prefix: | smmt_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Collaborative Arrangement, Rights And Obligations, Upfront Payment, Paid In Shares + References No definition available. + Details
Name: | smmt_CollaborativeArrangementRightsAndObligationsUpfrontPaymentPaidInShares
Namespace Prefix: | smmt_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Collaborative Arrangement, Rights And Obligations, Upfront Payment, Shares Of Common Stock Issued In Lieu Of Cash + References No definition available. + Details
Name: | smmt_CollaborativeArrangementRightsAndObligationsUpfrontPaymentSharesOfCommonStockIssuedInLieuOfCash
Namespace Prefix: | smmt_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Payments For Collaborative Arrangement + References No definition available. + Details
Name: | smmt_PaymentsForCollaborativeArrangement
Namespace Prefix: | smmt_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Stock Issued During Period, Value, In Lieu Of Cash For Collaborative Arrangement + References No definition available. + Details
Name: | smmt_StockIssuedDuringPeriodValueInLieuOfCashForCollaborativeArrangement
Namespace Prefix: | smmt_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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 Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 808 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479402/808-10-50-1 + Details
Name: | us-gaap_CollaborativeArrangementsAndNoncollaborativeArrangementTransactionsLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Face amount or stated value per share of common stock. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(29)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 + Details
Name: | us-gaap_CommonStockParOrStatedValuePerShare
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:perShareItemType
Balance Type: | na
Period Type: | instant

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

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

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