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Financial Instruments - Fair Values and Risk Management - Summary of Trade Receivables Past Due (Detail) - EUR (€) € in Thousands | Dec. 31, 2023 | Dec. 31, 2022
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Disclosure of detailed information about financial instruments [line items] |  |
Trade receivables | € 33,304 | € 39,056
Gross carrying amount [member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Trade receivables | 37,567 | 44,660
Accumulated impairment [member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Trade receivables | (4,263) | (5,604)
Current (not past due) |  |
Disclosure of detailed information about financial instruments [line items] |  |
Trade receivables | 25,520 | 29,111
From 1 to 29 days past due |  |
Disclosure of detailed information about financial instruments [line items] |  |
Trade receivables | 4,707 | 7,158
From 30 to 60 days past due |  |
Disclosure of detailed information about financial instruments [line items] |  |
Trade receivables | 1,053 | 1,355
From 61 to 90 days past due |  |
Disclosure of detailed information about financial instruments [line items] |  |
Trade receivables | 429 | 563
More than 90 days past due |  |
Disclosure of detailed information about financial instruments [line items] |  |
Trade receivables | € 5,858 | € 6,473

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