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Long-term Borrowings - Summary of Detailed Information About Loans Outstanding (Detail) - EUR (€) € in Thousands | Dec. 31, 2019 | Dec. 31, 2018
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Disclosure of detailed information about borrowings [line items] |  |
Total long-term debt | € 18,412 | € 20,943
Less current installments | (4,321) | (10,582)
Long-term borrowings, excluding current installments | 14,091 | 10,361
6-months Euribor (360) plus a 3.9% spread long-term debt with final payment due August 2019 [member] |  |
Disclosure of detailed information about borrowings [line items] |  |
Total long-term debt |  | 893
6-months Euribor (360) plus a 2.5% spread long-term debt with final payment due August 2021 [Member] |  |
Disclosure of detailed information about borrowings [line items] |  |
Total long-term debt | 4,601 | 6,631
3-months Euribor (360) plus a 4% spread long-term debt with final payment due June 2021 [member] |  |
Disclosure of detailed information about borrowings [line items] |  |
Total long-term debt | 1,500 | 2,500
6-months Euribor (360) plus a 2.9% spread long-term debt with final payment due December 2020 [member] |  |
Disclosure of detailed information about borrowings [line items] |  |
Total long-term debt | 42 | 83
3-months Euribor (360) plus a 2.2% spread long-term debt with final payment due February 2022 [member] |  |
Disclosure of detailed information about borrowings [line items] |  |
Total long-term debt | 428 | 628
3-months Euribor (360) plus a 3.5% spread long-term debt with final payment due March 2022 [member] |  |
Disclosure of detailed information about borrowings [line items] |  |
Total long-term debt | 1,125 | 1,625
3-months Euribor (360) plus a 1.9% spread long-term debt with final payment due November 2022 [member] |  |
Disclosure of detailed information about borrowings [line items] |  |
Total long-term debt | 1,191 | 1,583
2.3% fixed long-term debt with final payment due July 2025 [member] |  |
Disclosure of detailed information about borrowings [line items] |  |
Total long-term debt | 6,075 | € 7,000
0.210% fixed long-term debt with final payment due December 2030 [Member] |  |
Disclosure of detailed information about borrowings [line items] |  |
Total long-term debt | 3,105 |
80% of 6-months Euribor (360) plus a 0.95% spread long-term debt with final payment due Jan. 2035 [Member] |  |
Disclosure of detailed information about borrowings [line items] |  |
Total long-term debt | € 345 |

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