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Revenue - Schedule of Revenue From Sale of Commercial Products (Detail) - EUR (€) € in Thousands | 3 Months Ended
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Mar. 31, 2026 | Mar. 31, 2025
Disclosure of operating segments [line items] |  |
Revenue from commercial products | € 240,853 | € 96,028
YORVIPATH [member] |  |
Disclosure of operating segments [line items] |  |
Revenue from commercial products | 196,896 | 44,688
SKYTROFA [member] |  |
Disclosure of operating segments [line items] |  |
Revenue from commercial products | € 43,957 | € 51,340

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- References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Note Expiry date 2027-01-01 -Name IAS -Number 1 -IssueDate 2025-01-01 -Paragraph 112 -Subparagraph c -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2025-en-b&anchor=para_112_c&doctype=Standard -URIDate 2025-03-27 + Details
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