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

Cash and Cash Equivalents (Schedule of Cash and Cash Equivalents) (Details)

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Cash and Cash Equivalents (Schedule of Cash and Cash Equivalents) (Details) - EUR (€)
€ in Thousands
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
[2]
Dec. 31, 2014
[2]
Cash and cash equivalents [abstract]        
Cash € 11,729 € 11,243    
On Call deposits [1] 12,333 11,243    
Total cash and cash equivalents € 23,962 € 22,486 [2] € 17,194 € 12,972
[1] The annual interest rate for deposits as of December 31, 2017 is 1.5% (0.75%-1.25% as of December 31, 2016).
[2] Please refer to note 2C for functional and presentation currency.