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Note 29 - Valuation Accounts - Schedule of Valuation Accounts (Details) - EUR (€)
€ in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
SEC Schedule, 12-09, Valuation Allowance, Deferred Tax Asset [Member]      
Balance € 14,266 € 19,450 € 19,212
Charges to costs and expenses 515 1,536 238
Deductions: write-off and others (228) (6,720)
Balance 14,553 14,266 19,450
SEC Schedule, 12-09, Allowance, Credit Loss [Member]      
Balance 1,029 960 1,091
Charges to costs and expenses 365 69 103
Deductions: write-off and others 10 (233)
Balance 1,404 1,029 960
SEC Schedule, 12-09, Reserve, Inventory [Member]      
Balance 723 803 728
Charges to costs and expenses 355 239 121
Deductions: write-off and others (104) (319) (46)
Balance 974 723 803
SEC Schedule, 12-09, Reserve, Warranty [Member]      
Balance 449 548 576
Charges to costs and expenses 433 316 319
Deductions: write-off and others (334) (415) (347)
Balance € 548 € 449 € 548