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Financial Instruments - Fair Values and Risk Management - Summary Of Quantitative Information About Exposure To Currency Risk (Detail) - EUR (€) € in Thousands	Dec. 31, 2021	Dec. 31, 2020
Disclosure of detailed information about financial instruments [line items]
Financial assets	€ 110,699	€ 95,430
Financial liabilities	232,083	203,616
U.S. dollars [member]
Disclosure of detailed information about financial instruments [line items]
Financial assets	29,658	26,464
Financial liabilities	46,930	35,295
Net Exposure	(17,272)	(8,831)
Chinese Yuan [member]
Disclosure of detailed information about financial instruments [line items]
Financial assets	18,927	21,047
Financial liabilities	14,192	15,999
Net Exposure	4,735	5,048
British pounds [member]
Disclosure of detailed information about financial instruments [line items]
Financial assets	15,027	13,110
Financial liabilities	16,664	16,845
Net Exposure	(1,637)	(3,735)
Brazilian Reais [member]
Disclosure of detailed information about financial instruments [line items]
Financial assets	4,334	3,753
Financial liabilities	2,435	2,173
Net Exposure	1,899	1,580
Canadian dollars [member]
Disclosure of detailed information about financial instruments [line items]
Financial assets	2,263	1,693
Financial liabilities	1,290	88
Net Exposure	973	1,605
Romanian Leu [member]
Disclosure of detailed information about financial instruments [line items]
Financial assets	666	901
Financial liabilities	7,934	7,090
Net Exposure	(7,268)	(6,189)
Mexican pesos [member]
Disclosure of detailed information about financial instruments [line items]
Financial assets	1,395	797
Financial liabilities	1,883	1,166
Net Exposure	(488)	(369)
Other [member]
Disclosure of detailed information about financial instruments [line items]
Financial assets	5,178	3,115
Financial liabilities	7,233	4,574
Net Exposure	(2,055)	(1,459)
Total currencies [member]
Disclosure of detailed information about financial instruments [line items]
Financial assets	77,448	70,880
Financial liabilities	98,561	83,230
Net Exposure	€ (21,113)	€ (12,350)

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The amount of assets that are: (a) cash; (b) an equity instrument of another entity; (c) a contractual right: (i) to receive cash or another financial asset from another entity; or (ii) to exchange financial assets or financial liabilities with another entity under conditions that are potentially favourable to the entity; or (d) a contract that will, or may be, settled in the entity’s own equity instruments and is: (i) a non-derivative for which the entity is, or may be, obliged to receive a variable number of the entity’s own equity instruments; or (ii) a derivative that will, or may be, settled other than by the exchange of a fixed amount of cash or another financial asset for a fixed number of the entity’s own equity instruments. For this purpose the entity’s own equity instruments do not include puttable financial instruments classified as equity instruments in accordance with paragraphs 16A-16B of IAS 32, instruments that impose on the entity an obligation to deliver to another party a pro rata share of the net assets of the entity only on liquidation and are classified as equity instruments in accordance with paragraphs 16C-16D of IAS 32, or instruments that are contracts for the future receipt or delivery of the entity’s own equity instruments. [Refer: Financial instruments, class [member]; Financial liabilities]

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The amount of liabilities that are: (a) a contractual obligation: (i) to deliver cash or another financial asset to another entity; or (ii) to exchange financial assets or financial liabilities with another entity under conditions that are potentially unfavourable to the entity; or (b) a contract that will, or may be, settled in the entity’s own equity instruments and is: (i) a non-derivative for which the entity is, or may be, obliged to deliver a variable number of the entity’s own equity instruments; or (ii) a derivative that will, or may be, settled other than by the exchange of a fixed amount of cash or another financial asset for a fixed number of the entity’s own equity instruments. For this purpose, rights, options or warrants to acquire a fixed number of the entity’s own equity instruments for a fixed amount of any currency are equity instruments if the entity offers the rights, options or warrants pro rata to all of its existing owners of the same class of its own non-derivative equity instruments. Also, for those purposes the entity’s own equity instruments do not include puttable financial instruments that are classified as equity instruments in accordance with paragraphs 16A-16B of IAS 32, instruments that impose on the entity an obligation to deliver to another party a pro rata share of the net assets of the entity only on liquidation and are classified as equity instruments in accordance with paragraphs 16C-16D of IAS 32, or instruments that are contracts for the future receipt or delivery of the entity’s own equity instruments. As an exception, an instrument that meets the definition of a financial liability is classified as an equity instrument if it has all the features and meets the conditions in paragraphs 16A-16B or paragraphs 16C-16D of IAS 32. [Refer: Financial instruments, class [member]; Financial assets; Derivatives [member]]

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