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Trade and other receivables - ECL (Details) - EUR (€) € in Thousands | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019
Trade notes and accounts receivable |  |
Trade and other receivables |  |
Financial assets at beginning of period | € 9,497 |
Financial assets at end of period | 6,651 | € 9,497
Trade notes and accounts receivable | Accumulated impairment |  |
Trade and other receivables |  |
Financial assets at beginning of period | (8,283) | (4,254)
Additions | (4,349) | (6,178)
Reversal | 129 | 318
Use of provision | (3,557) | (2,025)
Effect of translation | 885 | (194)
Financial assets at end of period | (8,061) | (8,283)
Other receivables | Accumulated impairment |  |
Trade and other receivables |  |
Financial assets at beginning of period | (503) | (484)
Additions | (215) | (71)
Reversal | 30 | 54
Use of provision | (75) |
Effect of translation | 24 | (2)
Financial assets at end of period | € (589) | € (503)

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