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v3.22.4

Summary of significant accounting policies, Right-of-use assets and lease liabilities (Details) | 12 Months Ended
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Dec. 31, 2022
Buildings [Member] |
Right-of-use assets and lease liabilities: |
Estimated lease term | 5 years
Office Equipment [Member] |
Right-of-use assets and lease liabilities: |
Estimated lease term | 5 years
IT Equipment |
Right-of-use assets and lease liabilities: |
Estimated lease term | 5 years

X
- Definition The estimated lease term, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References No definition available. + Details
Name: | aciu_EstimatedLeaseTerm
Namespace Prefix: | aciu_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | ifrs-full_DisclosureOfQuantitativeInformationAboutLeasesForLesseeAbstract
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis=ifrs-full_BuildingsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis=ifrs-full_OfficeEquipmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis=ifrs-full_ComputerEquipmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |