XML 114 R74.htm IDEA: XBRL DOCUMENT v3.8.0.1
Non-Current Provisions - Schedule of Commitments for Compensation Payable to Employees Upon Their Retirement (Detail) - EUR (€)
€ in Thousands
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Disclosure of Retirement Benefits [Abstract]      
Beginning balance € (853) € (490) € (531)
Costs of services rendered (operating expense) (219) (104) (116)
Interest expense (finance expense) (11) (10) (9)
Benefit paid 0 0 0
Actuarial gains (177) (249) 166
Ending balance € (1,260) € (853) € (490)