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Details of the Statements of Profit or Loss and Other Comprehensive Income (Loss) - Schedule of General and Administrative Expenses (Details) - EUR (€) € in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Schedule of General and Administrative Expenses [Abstract]
Salaries and related compensation	€ 1,848	€ 1,797	€ 2,151
Professional services	3,275	2,306	2,367
Other	940	1,180	1,337
Total general and administrative expenses	€ 6,063	€ 5,283	€ 5,855

X

- Definition

Other general and administrative expenses.

+ References

No definition available.

+ Details

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Namespace Prefix:	ello_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Professional services in respect of general and administrative expenses.

+ References

No definition available.

+ Details

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Namespace Prefix:	ello_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- References

No definition available.

+ Details

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Namespace Prefix:	ello_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The amount of expense relating to general and administrative activities of the entity.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2024-01-01
-Paragraph 112
-Subparagraph c
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_112_c&doctype=Standard
-URIDate 2024-03-27

+ Details

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Namespace Prefix:	ifrs-full_
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Balance Type:	debit
Period Type:	duration

X

- Definition

A class of employee benefits expense that represents wages and salaries. [Refer: Employee benefits expense]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 19
-IssueDate 2024-01-01
-Paragraph 9
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2024-en-r&anchor=para_9&doctype=Standard
-URIDate 2024-03-27

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Balance Type:	debit
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