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Financial Instruments (Narrative) (Details) € in Thousands, ₪ in Thousands, $ in Thousands | 1 Months Ended | 12 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | ---
Jun. 30, 2018 | Dec. 31, 2021 ILS (₪) | Dec. 31, 2021 EUR (€) | Dec. 31, 2021 USD ($) | Dec. 31, 2020 EUR (€) | Dec. 31, 2020 USD ($) | Dec. 31, 2019 EUR (€) | Dec. 31, 2018 EUR (€)
Disclosure of financial assets [line items] |  |  |  |  |  |  |  |
Cash and cash equivalents |  |  | € 41,229 | $ 46,663 | € 66,845 | $ 75,655 | € 44,509 | € 36,882
Derivative financial assets |  |  | 1,946 | 2,202 | 1,761 |  |  |
Short-term restricted cash |  |  | 1,000 | 1,132 | 0 |  |  |
Non-current restricted cash |  |  | 15,630 | $ 17,690 | 9,931 |  |  |
Trade receivables |  |  | 598 |  | 382 |  |  |
Revenue receivables |  |  | 3,794 |  | 3,420 |  |  |
Government authorities receivables |  |  | € 1,602 |  | € 3,232 |  |  |
Denominated notional principal amount | ₪ |  | ₪ 100,000 |  |  |  |  |  |
Talasol [Member] |  |  |  |  |  |  |  |
Disclosure of financial assets [line items] |  |  |  |  |  |  |  |
Output percentage of financial power swap | 80.00% |  |  |  |  |  |  |
Period of financial power swap | 10 years |  |  |  |  |  |  |

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