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Fixed Assets (Details) - EUR (€) € in Thousands | Jun. 30, 2024 | Dec. 31, 2023 | Dec. 31, 2022
--- | --- | --- | ---
Fixed Assets [Abstract] |  |  |
Comparative amounts |  | € 2,491 | € 2,412
Acquired fixed assets | € 22,077 |  |

X
- Definition Acquired fixed assets. + References No definition available. + Details
Name: | ello_AcquiredFixedAssets
Namespace Prefix: | ello_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Comparative amounts. + References No definition available. + Details
Name: | ello_ComparativeAmount
Namespace Prefix: | ello_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- References No definition available. + Details
Name: | ifrs-full_PropertyPlantAndEquipmentAbstract
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration