XML 52 R42.htm IDEA: XBRL DOCUMENT
v3.25.1

Commitments (Details) $ in Millions |  | 3 Months Ended |
--- | --- | --- | ---
Oct. 04, 2023 USD ($) | Mar. 31, 2025 USD ($) | Mar. 31, 2024 USD ($) | Oct. 04, 2024 item
License agreement |  |  |  |
Commitments |  |  |  |
Upfront license fee paid | $ 15.0 |  |  |
Maximum fee payable | 305.0 |  |  |
Maximum fee payable, upon achievement of development milestones | 20.0 |  |  |
Maximum fee payable, upon achievement of regulatory milestones | 70.0 |  |  |
Maximum, upon achievement of commercial milestones | 215.0 |  |  |
Maximum number of indications under regulatory approval and commercial sales milestones | item |  |  |  | 3
Achievement of clinical milestones |  | $ 2.2 |  |
Aggregate milestone payments |  | $ 2.0 | $ 0.0 |
Research services agreement |  |  |  |
Commitments |  |  |  |
Maximum fee payable, upon achievement of regulatory milestones | 5.4 |  |  |
Maximum, upon achievement of commercial milestones | 6.5 |  |  |
Achievement of clinical milestones | $ 2.2 |  |  |
Aggregate milestone payments |  |  | $ 0.0 |

X
- Definition The amount of cash outflow pertaining to aggregate milestone payments. + References No definition available. + Details
Name: | atxs_AggregateMilestonePayments
Namespace Prefix: | atxs_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Number of indications for license fee payable related to related to regulatory approval and commercial sales milestones. + References No definition available. + Details
Name: | atxs_LicenseeFeePayableRegulatoryApprovalAndCommercialSalesMilestonesMaximumNumberOfIndications
Namespace Prefix: | atxs_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition The maximum amount of fee payable. + References No definition available. + Details
Name: | atxs_MaximumFeePayable
Namespace Prefix: | atxs_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The maximum amount of fee payable upon achievement of clinical milestones. + References No definition available. + Details
Name: | atxs_MaximumFeePayableUponAchievementOfClinicalMilestones
Namespace Prefix: | atxs_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The maximum amount of fee payable upon achievement of development milestones. + References No definition available. + Details
Name: | atxs_MaximumFeePayableUponAchievementOfDevelopmentMilestones
Namespace Prefix: | atxs_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The maximum amount of fee payable upon achievement of regulatory milestones. + References No definition available. + Details
Name: | atxs_MaximumFeePayableUponAchievementOfRegulatoryMilestones
Namespace Prefix: | atxs_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The maximum amount of fee payable upon achievement of commercial milestones. + References No definition available. + Details
Name: | atxs_MaximumfeePayableMaximumUponAchievementOfCommercialMilestones
Namespace Prefix: | atxs_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The amount of upfront license fee paid. + References No definition available. + Details
Name: | atxs_PaymentOfUpfrontLicenseFees
Namespace Prefix: | atxs_
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
- Details
Name: | us-gaap_TypeOfArrangementAxis=us-gaap_LicensingAgreementsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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