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Share-Based Payment - Additional Information (Detail) | 12 Months Ended |
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Dec. 31, 2024 € / shares shares | Dec. 31, 2023 € / shares | Dec. 31, 2022 € / shares | Dec. 31, 2021 | Dec. 31, 2024 kr / shares shares
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |
Share nominal value | kr / shares |  |  |  |  | kr 1
Weighted average remaining life for outstanding warrants | 65 months |  |  |  |
Restricted Stock Units [Member] |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |
Vesting period | 3 years |  |  |  |
Performance Stock Units [Member] |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |
Vesting conditions | For the March 2024 PSU grant, in addition to service conditions, vesting is also contingent upon achievement of long-term strategic goals as evaluated by the Board no later than two weeks prior to each vesting date. Exceeding performance targets will not result in vesting of more PSUs than 100%, nor will it result in additional grants. |  |  |  |
Warrants [member] |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |
Weighted average remaining life for outstanding warrants |  | 71 months | 77 months |  |
Warrants [member] | Bottom of range [member] |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |
Exercise price | € 11.98 | € 11.98 | € 6.48 |  |
Warrants [member] | Top of range [member] |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |
Exercise price | € 145.5 | € 145.5 | € 145.5 |  |
Warrants Granted 2012 Until November 2021 [member] |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |
Vesting period |  |  |  | 24 months |
Warrants Granted From December 2021 [member] |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |
Vesting period |  |  |  | 12 months |
Board members of group [member] |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |
Number of additional shares authorized to grant | shares | 2,060,116 |  |  |  | 2,060,116
Board members of group [member] | Warrants Granted From December 2021 [member] |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |
Percentage of warrants vested |  |  |  | 75.00% |
Employees and consultants [member] | Warrants Granted From December 2021 [member] |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |
Percentage of warrants vested |  |  |  | 75.00% |
Later than one year [member] | Warrants Granted 2012 Until November 2021 [member] |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |
Vesting period |  |  |  | 48 months |
Later than one year [member] | Warrants Granted From December 2021 [member] |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |
Vesting period |  |  |  | 36 months |
Later than one year [member] | Board members of group [member] | Warrants Granted From December 2021 [member] |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |
Percentage of warrants vested |  |  |  | 25.00% |
Later than one year [member] | Employees and consultants [member] | Warrants Granted From December 2021 [member] |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |
Percentage of warrants vested |  |  |  | 25.00% |

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