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Restricted Cash and Deposits (Details) - Schedule of Restricted Cash and Deposits - Restricted Cash, Deposits and Marketable Securities [Member] - EUR (€) € in Thousands | Jun. 30, 2024 | Dec. 31, 2023
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Schedule of Restricted Cash and Deposits [Line Items] |  |  |
Short-term restricted cash |  | € 729 | € 810
Short-term deposits |  | 2,487 | 997
Restricted cash and bank deposits, long-term | [1] | € 17,340 | € 17,386
[1] | Deposits used to secure obligations towards the Israeli Electricity Authority for the license for the pumped-storage project in the Manara Cliff in Israel and to secure obligations under loan agreements.

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- Definition Restricted cash and long-term bank deposits. + References No definition available. + Details
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Namespace Prefix: | ello_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- References No definition available. + Details
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- Definition The amount of short-term deposits held by the entity. + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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- Definition The amount of current restricted cash and cash equivalents. [Refer: Restricted cash and cash equivalents] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2024-01-01 -Paragraph 55 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_55&doctype=Standard -URIDate 2024-03-27 + Details
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Balance Type: | debit
Period Type: | instant

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- Details
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