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Restricted Cash, Deposits and Marketable Securities (Schedule of Restricted Cash) (Details) € in Thousands, $ in Thousands | Jun. 30, 2023 EUR (€) | Jun. 30, 2023 USD ($) | [2] | Dec. 31, 2022 EUR (€)
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Disclosure of Restricted cash deposits and marketable securities [Abstract] |  |  |  |  |  |
Marketable securities |  | € 0 | [1] | $ 0 | € 2,836 | [1]
Short-term restricted cash |  | 810 |  | 880 | 900 |
Short-term deposits |  | 1,007 |  | $ 1,094 | 0 |
Restricted cash and bank deposits, long-term | [3] | € 19,018 |  |  | € 20,192 |
[1] | During 2022, the Company invested in a traded Corporate Bond with a coupon rate of 3.255% that were sold at the beginning of 2023.
[2] | Convenience translation into US$ (exchange rate as at June 30, 2023: EUR 1 = US$ 1.086)
[3] | 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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