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Note 30 - Valuation Accounts - Schedule of Valuation Accounts (Details) - EUR (€) € in Thousands | 12 Months Ended
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Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
SEC Schedule, 12-09, Valuation Allowance, Deferred Tax Asset [Member] |  |  |
Balance | € 14,553 | € 14,266 | € 19,450
Charges to costs and expenses | 859 | 515 | 1,536
Deductions: write-off and others | (435) | (228) | (6,720)
Balance | 14,977 | 14,553 | 14,266
SEC Schedule, 12-09, Allowance, Credit Loss [Member] |  |  |
Balance | 1,404 | 1,029 | 960
Charges to costs and expenses | 94 | 365 | 69
Deductions: write-off and others | (9) | 10 |
Balance | 1,490 | 1,404 | 1,029
SEC Schedule, 12-09, Reserve, Inventory [Member] |  |  |
Balance | 974 | 723 | 803
Charges to costs and expenses | 333 | 355 | 239
Deductions: write-off and others | (223) | (104) | (319)
Balance | 1,085 | 974 | 723
SEC Schedule, 12-09, Reserve, Warranty [Member] |  |  |
Balance | 548 | 449 | 548
Charges to costs and expenses | 131 | 433 | 316
Deductions: write-off and others | (308) | (334) | (415)
Balance | € 370 | € 548 | € 449

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- Definition Amount of valuation and qualifying accounts and reserves. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SX 210.12-09(Column B)) -URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e24092-122690 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SX 210.12-09(Column E)) -URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e24092-122690 + Details
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- Definition Amount of increase in valuation and qualifying accounts and reserves from charge to cost and expense. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SX 210.12-09(Column C)(1)) -URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e24092-122690 + Details
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- Definition Amount of increase (decrease) in valuation and qualifying accounts and reserves. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SX 210.12-09) -URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e24092-122690 + Details
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