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Share Capital, Reserves and Retained Earnings - Disclosure of Disaggregation of Changes of OCI (Detail) - EUR (€) | 12 Months Ended
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Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Disclosure of Share Capital Reserves and Other Equity Interest [line items] |  |  |
Exchange difference on translation of foreign operations | € 524,000 | € 1,709,000 | € (3,575,000)
Share of OCI of equity-method investees | (784,000) | 2,328,000 | (373,000)
Actuarial losses on employees' leaving entitlement | 2,309,000 | (627,000) | (212,000)
Total | 2,049,000 | 3,410,000 | (4,160,000)
Translation reserve [member] |  |  |
Disclosure of Share Capital Reserves and Other Equity Interest [line items] |  |  |
Exchange difference on translation of foreign operations | 524,000 | 1,709,000 | (3,575,000)
Share of OCI of equity-method investees | (784,000) | 2,328,000 | (373,000)
Total | 260,000 | 4,037,000 | (3,948,000)
Remeasurement of defined benefit obligation [member] |  |  |
Disclosure of Share Capital Reserves and Other Equity Interest [line items] |  |  |
Actuarial losses on employees' leaving entitlement | 2,309,000 | (627,000) | (212,000)
Total | € 2,309,000 | € (627,000) | € (212,000)

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- Definition The amount of other comprehensive income, before tax, after reclassification adjustments, related to exchange differences on translation of financial statements of foreign operations. [Refer: Other comprehensive income, before tax] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2022-03-24 -Paragraph 91 -Subparagraph b -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2022-en-r&anchor=para_91_b&doctype=Standard -URIDate 2022-03-24 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2022-03-24 -Paragraph 7 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2022-en-r&anchor=para_7&doctype=Standard -URIDate 2022-03-24 + Details
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