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Long-term Loans (Schedule of Movement in Liabilities Deriving from Financing Activities) (Details) - EUR (€) € in Thousands | 12 Months Ended
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Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015 | [1]
Disclosure of detailed information about borrowings [line items] |  |  |  |
Balance as at January 1, 2017 | € 55,865 |  |  |
Changes from financing cash flows |  |  |  |
Loan from business combination | 21,370 |  |  |
Proceeds from issue of convertible debentures | 31,175 |  | [1] |
Payment of Debentures | (4,842) | (4,954) | [1] | € (4,717)
Receipt of loans | 7,443 |  |  |
Repayment of loans | (1,892) |  |  |
Accrued interest | 161 |  |  |
Payment of finance lease liability | (332) |  |  |
Transaction costs related to borrowings | 499 |  |  |
Total net financing cash flows | 109,447 |  |  |
Effect of changes in foreign exchange rates | (2,932) |  |  |
Balance as at December 31, 2017 | 106,515 | 55,865 |  |
Loans and borrowings [Member] |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |
Balance as at January 1, 2017 | 17,737 |  |  |
Changes from financing cash flows |  |  |  |
Loan from business combination | 21,370 |  |  |
Proceeds from issue of convertible debentures |  |  |  |
Payment of Debentures |  |  |  |
Receipt of loans | 7,443 |  |  |
Repayment of loans | (1,892) |  |  |
Accrued interest | 161 |  |  |
Payment of finance lease liability |  |  |  |
Transaction costs related to borrowings | 165 |  |  |
Total net financing cash flows | 44,984 |  |  |
Effect of changes in foreign exchange rates | (120) |  |  |
Balance as at December 31, 2017 | 44,864 | 17,737 |  |
Convertible debentures [Member] |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |
Balance as at January 1, 2017 | 33,790 |  |  |
Changes from financing cash flows |  |  |  |
Loan from business combination |  |  |  |
Proceeds from issue of convertible debentures | 31,175 |  |  |
Payment of Debentures | (4,842) |  |  |
Receipt of loans |  |  |  |
Repayment of loans |  |  |  |
Accrued interest |  |  |  |
Payment of finance lease liability |  |  |  |
Transaction costs related to borrowings | 320 |  |  |
Total net financing cash flows | 60,443 |  |  |
Effect of changes in foreign exchange rates | (2,812) |  |  |
Balance as at December 31, 2017 | 57,631 | 33,790 |  |
Finance lease liability [Member] |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |
Balance as at January 1, 2017 | 4,338 |  |  |
Changes from financing cash flows |  |  |  |
Loan from business combination |  |  |  |
Proceeds from issue of convertible debentures |  |  |  |
Payment of Debentures |  |  |  |
Receipt of loans |  |  |  |
Repayment of loans |  |  |  |
Accrued interest |  |  |  |
Payment of finance lease liability | (332) |  |  |
Transaction costs related to borrowings | 14 |  |  |
Total net financing cash flows | 4,020 |  |  |
Effect of changes in foreign exchange rates |  |  |  |
Balance as at December 31, 2017 | € 4,020 | € 4,338 |  |
[1] | Please refer to note 2C for functional and presentation currency.

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