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Significant Accounting Judgements and Estimates - Additional Information (Detail) - EUR (€) € in Thousands | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jun. 30, 2024 | Mar. 31, 2024 | Jun. 30, 2023 | Jun. 30, 2024 | Jun. 30, 2023 | Dec. 31, 2023
Disclosure of changes in accounting estimates [line items] |  |  |  |  |  |
Provisions | € 106,768 |  |  | € 106,768 |  | € 32,719
Revenue | 35,998 |  | € 47,393 | 131,892 | € 80,982 |
Adjustment to Prior Periods Estimates and Assumptions [Member] |  |  |  |  |  |
Disclosure of changes in accounting estimates [line items] |  |  |  |  |  |
Revenue | 27,100 | € 19,500 |  |  |  | 7,600
Sales rebates and product returns in U.S. market [member] |  |  |  |  |  |
Disclosure of changes in accounting estimates [line items] |  |  |  |  |  |
Provisions | € 106,800 |  |  | € 106,800 |  | € 32,700

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