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Company Information - Bonus share award plans ("AGA") (Details) |  |  |  | 12 Months Ended
--- | --- | --- | --- | ---
Dec. 14, 2020 EUR (€) € / shares | Jun. 28, 2020 EUR (€) € / shares | Jan. 26, 2020 EUR (€) € / shares | Dec. 31, 2020 EUR (€) € / shares | Dec. 31, 2019 EUR (€) | Dec. 31, 2018 EUR (€)
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |
Number of bonus shares granted |  |  |  |  | 10,000 |
Number of bonus shares fully vested |  |  |  |  | 27,400 |
Capital increase arising from the vesting of bonus share awards | € |  |  |  | € 938,000 | € 1,407,000 | € 833,000
Par value per share | € / shares |  |  |  | € 0.01 |  |
AGA |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |
Number of bonus shares fully vested |  |  |  | 517,550 |  |
AGA 2018-2 |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |
Number of bonus shares granted |  |  |  | 65,700 |  | 65,700
Vesting period |  |  |  | 2 years |  |
Number of bonus shares fully vested |  |  | 63,300 | 63,300 |  |
Capital increase arising from the vesting of bonus share awards | € |  |  | € 633,000 |  |  |
Par value per share | € / shares |  |  | € 0.01 |  |  |
AGA 2019-2 |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |
Number of bonus shares granted |  |  |  | 246,000 | 246,000 |
Vesting period |  |  |  | 1 year |  |
Number of bonus shares fully vested |  | 227,000 |  | 227,000 |  |
Capital increase arising from the vesting of bonus share awards | € |  | € 2,270 |  |  |  |
Par value per share | € / shares |  | € 0.01 |  |  |  |
AGA 2018-3 |  |  |  |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |  |  |  |
Number of bonus shares granted |  |  |  | 265,700 |  | 265,700
Vesting period |  |  |  | 2 years |  |
Number of bonus shares fully vested | 227,250 |  |  | 227,250 |  |
Capital increase arising from the vesting of bonus share awards | € | € 2,272,500.0 |  |  |  |  |
Par value per share | € / shares | € 0.01 |  |  |  |  |

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- Definition The increase (decrease) in equity resulting from share-based payment transactions. [Refer: Equity] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2020-01-01 -Paragraph 106 -Subparagraph d -Clause iii -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_106_d_iii&doctype=Standard -URIDate 2020-01-01 + Details
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- Definition The number of other equity instruments (ie other than share options) granted in a share-based payment arrangement. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 2 -IssueDate 2020-01-01 -Paragraph 47 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2020-en-r&anchor=para_47_b&doctype=Standard -URIDate 2020-01-01 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Name IFRS -Number 2 -IssueDate 2020-01-01 -Paragraph 45 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2020-en-r&anchor=para_45&doctype=Standard -URIDate 2020-01-01 + Details
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- Definition The nominal value per share. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2020-01-01 -Paragraph 79 -Subparagraph a -Clause iii -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_79_a_iii&doctype=Standard -URIDate 2020-01-01 + Details
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- Definition Period which the right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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