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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