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Trade Payables and Other Current Liabilities - Summary of Trade Payables Break Down By Payment Date (Details) - EUR (€) € in Thousands | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
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TradePayablesAndOtherCurrentLiabilities [line items] |  |  |
Trade payables | € 6,923 | € 7,491 | € 8,372
Due in 30 days |  |  |
TradePayablesAndOtherCurrentLiabilities [line items] |  |  |
Trade payables | 6,834 | 7,414 | 7,966
Due in 30 60 days |  |  |
TradePayablesAndOtherCurrentLiabilities [line items] |  |  |
Trade payables | € 89 | € 77 | € 406

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- Definition The current amount of payment due to suppliers for goods and services used in entity's business. [Refer: Current liabilities; Trade payables] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2020-01-01 -Paragraph 78 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_78&doctype=Standard -URIDate 2020-01-01 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Name IAS -Number 1 -IssueDate 2020-01-01 -Paragraph 70 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_70&doctype=Standard -URIDate 2020-01-01 + Details
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