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Financial Instruments (Details) € in Thousands, $ in Thousands | 12 Months Ended |  |  |
--- | --- | --- | --- | ---
Dec. 31, 2022 EUR (€) | Dec. 31, 2021 EUR (€) | Dec. 31, 2023 EUR (€) | Dec. 31, 2023 USD ($) | Dec. 31, 2022 USD ($) | Dec. 31, 2020 EUR (€)
Financial Instruments [Abstract] |  |  |  |  |  |
Cash and cash equivalents | € 46,458 | € 41,229 | € 51,127 | $ 56,548 | $ 51,384 | € 66,845
Derivative financial assets | 900 |  | 810 | 896 |  |
Non-current restricted cash | 20,192 |  | 17,386 | $ 19,230 |  |
Trade receivables | 420 |  | 205 |  |  |
Revenue receivables | 1,062 |  | 1,013 |  |  |
Government authorities receivables | 3,752 |  | € 4,851 |  |  |
Increase (decrease) in working capital | € 5,199 |  |  |  |  |
Percentage of income |  |  | 80.00% | 80.00% |  |
Deposit value |  | € 10,000 |  |  |  |
Pecentage of reducing fund |  | 10.00% |  |  |  |
Security fund amount |  | € 3,500 |  |  |  |

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- Definition The amount of cash on hand and demand deposits, along with short-term, highly liquid investments that are readily convertible to known amounts of cash and that are subject to an insignificant risk of changes in value. [Refer: Cash; Cash equivalents] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 7 -IssueDate 2023-01-01 -Paragraph 45 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=7&code=ifrs-tx-2023-en-r&anchor=para_45&doctype=Standard -URIDate 2023-03-23 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 12 -IssueDate 2023-01-01 -Paragraph B13 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=12&code=ifrs-tx-2023-en-r&anchor=para_B13_a&doctype=Appendix&subtype=B -URIDate 2023-03-23 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2023-01-01 -Paragraph 54 -Subparagraph i -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2023-en-r&anchor=para_54_i&doctype=Standard -URIDate 2023-03-23 + Details
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