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Restricted Cash, Deposits and Marketable Securities (Schedule of Restricted Cash) (Details) € in Thousands, $ in Thousands | Dec. 31, 2022 EUR (€) | Dec. 31, 2022 USD ($) | Dec. 31, 2021 EUR (€)
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Disclosure Of Restricted Cash Deposits And Marketable Securities [Abstract] |  |  |  |
Marketable securities | [1] | € 2,836 |  | € 1,946
Short term deposits |  | 0 | $ 0 | 28,410
Short-term restricted cash |  | 900 | $ 960 | 1,000
Restricted cash and bank deposits, long-term | [2] | € 20,192 |  | € 15,630
[1] | The Company invested in a traded corporate bond with a coupon rate of 3.255% and in a traded US treasury bill with a coupon rate of 1.375%.
[2] | 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 (see Note 11).

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