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Financial Instruments (Narrative) (Details) - EUR (€)
€ in Thousands

1 Months Ended

Jun. 30, 2018

Dec. 31, 2019

Dec. 31, 2018

Dec. 31, 2017

Dec. 31, 2016

Disclosure of financial assets [line items]

Cash and cash equivalents

€ 44,509

€ 36,882

€ 23,962

€ 22,486

Marketable Securities

2,242

2,132

Short-term restricted cash

^[1]

22,162

1,315

^[2]

Non-current restricted cash

10,956

5,400

^[2]

Trade receivables

805

156

Revenue receivables

1,075

3,830

Government authorities receivables

€ 781

€ 2,706

Talasol [Member]

Disclosure of financial assets [line items]

Output percentage of financial power swap

80.00%

Period of financial power swap

10 years

[1]	On December 16, 2019, the Company announced its intention to repay the entire outstanding principal of the Company's Series
[2]	Reclassified, see Note 2E

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