XML 83 R52.htm IDEA: XBRL DOCUMENT
v3.25.4

LICENSE AGREEMENTS (Details) $ in Thousands |  | 12 Months Ended
--- | --- | ---
Apr. 05, 2016 USD ($) | Dec. 31, 2025 product | Dec. 31, 2021 USD ($) | Dec. 31, 2020 USD ($)
Research and Development Arrangement, Contract to Perform for Others [Line Items] |  |  |  |
Payment for achievement of clinical and regulatory milestones |  |  | $ 300 | $ 50
MGH | License Agreement |  |  |  |
Research and Development Arrangement, Contract to Perform for Others [Line Items] |  |  |  |
Number of products | product |  | 3 |  |
Clinical and regulatory milestone payments | $ 8,600 |  |  |
Commercial milestone payments | $ 18,000 |  |  |
Royalty rate, maximum reduction | 50.00% |  |  |
Expiration period | 10 years |  |  |

X
- Definition Number of Products Achieving Milestone to Trigger Maintenance Fee + References No definition available. + Details
Name: | kros_NumberOfProductsAchievingMilestoneToTriggerMaintenanceFee
Namespace Prefix: | kros_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Research And Development Agreement, Contract To Perform For Others, Clinical And Regulatory Milestone + References No definition available. + Details
Name: | kros_ResearchAndDevelopmentAgreementContractToPerformForOthersClinicalAndRegulatoryMilestone
Namespace Prefix: | kros_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Research And Development Agreement, Contract To Perform For Others, Commercial Milestone + References No definition available. + Details
Name: | kros_ResearchAndDevelopmentAgreementContractToPerformForOthersCommercialMilestone
Namespace Prefix: | kros_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Research And Development Agreement, Contract To Perform For Others, Royalty Rate, Maximum Reduction, Percentage + References No definition available. + Details
Name: | kros_ResearchAndDevelopmentAgreementContractToPerformForOthersRoyaltyRateMaximumReductionPercentage
Namespace Prefix: | kros_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Research and Development Arrangement, Contract to Perform for Others, Expiration Period + References No definition available. + Details
Name: | kros_ResearchAndDevelopmentArrangementContractToPerformForOthersExpirationPeriod
Namespace Prefix: | kros_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Research And Development Arrangement, Contract To Perform For Others, Payment For Achievement Of Clinical And Regulatory Milestone + References No definition available. + Details
Name: | kros_ResearchAndDevelopmentArrangementContractToPerformForOthersPaymentForAchievementOfClinicalAndRegulatoryMilestone
Namespace Prefix: | kros_
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 730 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147483041/730-20-50-1 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 730 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147483041/730-20-50-1 + Details
Name: | us-gaap_ResearchAndDevelopmentArrangementContractToPerformForOthersLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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

X
- Details
Name: | us-gaap_ResearchAndDevelopmentArrangementContractToPerformForOthersByTypeAxis=us-gaap_LicenseAgreementTermsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |