Income Tax - Summary of Current and Deferred Taxes (Detail) - EUR (€) |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
Jun. 30, 2026 |
Jun. 30, 2025 |
|
| Major components of tax expense (income) [abstract] | ||||
| Current income tax | € 0 | € 0 | € 0 | € 0 |
| Deferred income tax | 274,000 | 1,001,000 | 222,000 | 1,996,000 |
| Taxes on income | € 274,000 | € 1,001,000 | € 222,000 | € 1,996,000 |
| X | ||||||||||
- References Reference 1: http://www.xbrl.org/2003/role/exampleRef
|
| X | ||||||||||
- Definition The amount of tax expense (income) relating to changes in deferred tax liabilities and deferred tax assets. [Refer: Deferred tax assets; Deferred tax liabilities] Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- References Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- References No definition available.
|