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Finance Income and Costs - Summary of Analysis of Finance Income (Detail) - EUR (€)
€ in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Disclosure of Finance Income [abstract]    
Interest income from financial institutions € 191 € 325
Other interest income 188 927
Total € 379 € 1,252 [1]
[1] The Group has initially applied IFRS 9 as at January 1, 2018. Under the transition method chosen, comparative information has not been restated except for separately presenting impairment losses on trade receivables. See note 5.