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v3.25.1

Operating expenses - Selling, General and Administrative, Additional Information (Details) - EUR (€) € in Millions | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023
Disclosure Of Operating Expenses [Line Items] |  |
Advisory fees |  | € 1.4
Janssen |  |
Disclosure Of Operating Expenses [Line Items] |  |
Legal fees |  | 0.5
JJDC |  |
Disclosure Of Operating Expenses [Line Items] |  |
Legal fees |  | 0.3
Selling, general and administrative expense |  |
Disclosure Of Operating Expenses [Line Items] |  |
Increase (decrease) in rent, fees, and other expenses | € (1.8) | € 2.1
Increase (decrease) in rent, fees, and other expenses, percentage | (18.40%) | 27.00%

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- Definition Advisory Fees + References No definition available. + Details
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Balance Type: | credit
Period Type: | duration

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- Definition Disclosure Of Operating Expenses + References No definition available. + Details
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- Definition Increase (Decrease) In Purchases, Fees, And Other Expenses + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
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- Definition Legal Fees and Expenses + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Percentage Increase (Decrease) In Rent, Fees, And Other Expenses + References No definition available. + Details
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Data Type: | dtr-types1:percentItemType
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- Details
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Namespace Prefix: |
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Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
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Balance Type: |
Period Type: |

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- Details
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Data Type: | na
Balance Type: |
Period Type: |