The amount of an allowance account used to record impairments to financial assets due to credit losses. [Refer: Financial assets]

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Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table.

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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 percentage of the entity's revenue. [Refer: Revenue]

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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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The amount of undrawn borrowing facilities that may be available for future operating activities and to settle capital commitments. [Refer: Capital commitments]

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Contract assets gross carrying amount.

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No definition available.

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Estimated interest expense for the forthcoming year.

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Foreign currency exposure net liability asset.

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The amount of future annual interest expense on bank borrowings.

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The amount of financial leverage ratio of less than 1 is usually considered good by industry standards.

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No definition available.

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Line of credit maximum borrowing capacity.

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Percentage of sales in functional currency.

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Financial instruments - fair values and risk management - Additional Information (Details) € in Thousands	12 Months Ended
	Dec. 31, 2023 EUR (€)	Dec. 31, 2022 EUR (€)	Dec. 31, 2021
Disclosure of detailed information about financial instruments
Financial assets, Carrying amount	€ 136,521	€ 127,164
Percentage of sales in functional currency	71.00%
Accumulated impairment [member]
Disclosure of detailed information about financial instruments
Financial assets, Carrying amount	€ (14,300)	(14,300)
Contract assets
Disclosure of detailed information about financial instruments
Contract assets Gross Carrying Amount	61,200	50,600
Contract assets \| Accumulated impairment [member]
Disclosure of detailed information about financial instruments
Impairment loss allowance	(400)	(100)
Facility B \| Senior Facilities Agreement [Member] \| Stated Interest Of At least Zero Percent Or If Less Than Zero Percent Then Interest Rate Spread Of Three Point Five Percentage Points [Member]
Disclosure of detailed information about financial instruments
Estimated interest expense for the forthcoming year	1,800
RCF
Disclosure of detailed information about financial instruments
Undrawn borrowing facilities	220,000	220,000
Future annual interest expense	1,840	€ 1,840
RCF \| Senior Facilities Agreement [Member]
Disclosure of detailed information about financial instruments
Line of credit maximum borrowing capacity	€ 220,000
Less Than or Equal to Three \| RCF
Disclosure of detailed information about financial instruments
Leverage ratio	3.00	3.00
Less Than or Equal to Three \| RCF \| Senior Facilities Agreement [Member]
Disclosure of detailed information about financial instruments
Leverage ratio	3.00
Not Designated As Cash Flow Hedging Instruments [Member] \| Forward contract \| Currency risk \| US Dollars
Disclosure of detailed information about financial instruments
Foreign currency exposure net liability asset	€ 614,000	€ 35,100
Not Designated As Cash Flow Hedging Instruments [Member] \| Forward contract \| Currency risk \| Great Britain Pounds
Disclosure of detailed information about financial instruments
Foreign currency exposure net liability asset	€ 109,000	€ 49,300
No Customer
Disclosure of detailed information about financial instruments
Concentration of revenue percentage	10.00%	10.00%	10.00%