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Restricted Stock Units ("RSUs") Awards - Narrative (Details) - EUR (€) € in Thousands | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Number of shares reserved (in shares) | 43,312,150 |  |
Percentage annual increase in shares reserved for issuance (in shares) | 3.00% |  |
Award vesting period (in years) | 3 years |  |
RSU expense | € 10,337 | € 16,836 | € 24,261
Restricted Stock Units (RSUs) |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Weighted average remaining contractual life of outstanding share options | 1 year 8 months 12 days | 1 year 6 months | 1 year 7 months 6 days
Number of shares vested, but not issued (in shares) |  | 2,011,623 |
RSU expense | € 10,300 | € 16,800 | € 24,300
RSU expense, one-off expense |  |  | 23,100
Weighted average fair value at measurement date, other equity instruments granted | 18,600 | 7,500 | 5,900
Unrecognized compensation costs | € 5,900 | € 11,100 | € 23,400
Period to recognized unrecognized compensation expense (in years) | 1 year 4 months 24 days | 1 year 1 month 6 days | 1 year 3 months 18 days

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