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Share Capital, Reserves and Retained Earnings - Summary of net debt to equity ratio (Detail) € in Thousands | Dec. 31, 2022 EUR (€) | Dec. 31, 2021 EUR (€) | Dec. 31, 2020 EUR (€) | Dec. 31, 2019 EUR (€)
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Disclosure Of Net Debt To Equity Ratio [Abstract] |  |  |  |
Total liabilities | € 276,051 | € 306,186 |  |
Less cash and cash equivalents | (54,475) | (53,472) |  |
Net debt (a) | 221,576 | 252,714 |  |
Total equity (b) | € 92,556 | € 83,846 | € 75,364 | € 104,818
Net debt to equity ratio | 2.39 | 3.01 |  |

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