XML 81 R65.htm IDEA: XBRL DOCUMENT
v3.24.0.1

Net Loss per Share - Narrative (Details) - $ / shares | Mar. 01, 2023 | Aug. 08, 2022
--- | --- | ---
Subsidiary, Sale of Stock [Line Items] |  |
Share price (in dollars per share) | $ 1.82 |
Rights Offering |  |
Subsidiary, Sale of Stock [Line Items] |  |
Sale of stock price (in dollars per share) | $ 1.05 | $ 0.97

X
- Definition Per share amount received by subsidiary or equity investee for each share of common stock issued or sold in the stock transaction. + References No definition available. + Details
Name: | us-gaap_SaleOfStockPricePerShare
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition Price of a single share of a number of saleable stocks of a company. + References No definition available. + Details
Name: | us-gaap_SharePrice
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:perShareItemType
Balance Type: | na
Period Type: | instant

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

X
- Details
Name: | us-gaap_SubsidiarySaleOfStockAxis=smmt_RightsOfferingMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |