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Trade Receivables - Summary of Trade Receivables Disaggregated by Nature of Relations with Customers (Detail) - EUR (€) € in Thousands | Dec. 31, 2021 | Dec. 31, 2020
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Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items] |  |
Total trade receivables, net | € 41,259 | € 33,934
Gross Carrying Amount [Member] |  |
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items] |  |
Total trade receivables, net | 46,584 | 41,815
Gross Carrying Amount [Member] | Third Parties [Member] |  |
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items] |  |
Total trade receivables, net | 38,556 | 34,613
Gross Carrying Amount [Member] | Related Party [Member] |  |
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items] |  |
Total trade receivables, net | 8,028 | 7,202
Accumulated Impairment [Member] |  |
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items] |  |
Total trade receivables, net | € (5,325) | € (7,881)

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