Annual and transition report of foreign private issuers pursuant to Section 13 or 15(d)

Transactions and Balances with Related Parties (Schedule of Compensation to Individuals Employed by Company) (Details)

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Transactions and Balances with Related Parties (Schedule of Compensation to Individuals Employed by Company) (Details) - Director [Member]
€ in Thousands
12 Months Ended
Dec. 31, 2017
EUR (€)
People
Dec. 31, 2016
EUR (€)
People
Dec. 31, 2015
EUR (€)
People
Disclosure of transactions between related parties [line items]      
Number of people for short-term employee Benefits | People 2 2 [1] 4 [1]
Number of people for post employment Benefits | People 2 2 [1] 4 [1]
Number of people for Share-based payments | People 2 2 [1] 2 [1]
Short-term employee Benefits | € € 377 € 368 € 557
Post-employment Benefits | € 57 89 68
Share-based payments | € [2]
[1] Including retired employees that were not employed throughout the entire year
[2] Less than 1 thousand