Annual and transition report of foreign private issuers [Sections 13 or 15(d)]

Material accounting policies - Additional Information (Detail)

v3.25.1
Material accounting policies - Additional Information (Detail)
 1 Months Ended 12 Months Ended
Dec. 27, 2024
remedy
day
Dec. 19, 2022
EUR (€)
instrument
May 31, 2023
Dec. 31, 2022
EUR (€)
associate
Dec. 31, 2026
EUR (€)
Dec. 31, 2025
EUR (€)
Dec. 31, 2024
EUR (€)
covenant
associate
performance_obligation
event
Dec. 31, 2023
EUR (€)
instrument
associate
Dec. 31, 2022
EUR (€)
associate
Dec. 20, 2024
Dec. 31, 2021
EUR (€)
Disclosure Of Significant Accounting Policies [Line Items]                      
Equity       € 27,758,000     € (97,927,000) € (79,322,000) € 27,758,000   € (76,652,000)
Cash and cash equivalents       € 83,022,000     160,919,000 44,585,000 83,022,000   € 24,652,000
Non-current portion of non-current borrowings             512,014,000 350,722,000      
Lease liabilities             116,415,000 83,490,000      
Trade and other current payables             73,919,000 76,948,000      
Repayments of borrowings, classified as financing activities             0 0 23,403,000    
Proceeds from borrowings             € 164,851,000 € 82,400,000 € 159,210,000    
Number of associates | associate       1     1 1 1    
Number of performance obligations | performance_obligation             2        
Reimbursements number of suppliers | associate             1        
Commencement of major litigation                      
Disclosure Of Significant Accounting Policies [Line Items]                      
Anticipates receiving additional contractual capital commitments         € 10,000,000 € 150,000,000          
Interest Rate Cap                      
Disclosure Of Significant Accounting Policies [Line Items]                      
Notional amount   € 240,500,000           € 240,500,000      
Number of interest rates caps | instrument   2           2      
Interest Rate Cap | Interest rate risk                      
Disclosure Of Significant Accounting Policies [Line Items]                      
Derivative instrument mitigation risk percentage             65.00% 67.00%      
Office Building                      
Disclosure Of Significant Accounting Policies [Line Items]                      
Original contractual lease term             5 years        
Subleases contractual term             3 years        
Motor vehicles                      
Disclosure Of Significant Accounting Policies [Line Items]                      
Original contractual lease term             4 years        
Computer software                      
Disclosure Of Significant Accounting Policies [Line Items]                      
Original contractual lease term             5 years        
Lease contractual extension term             2 years        
Capitalized Development Costs                      
Disclosure Of Significant Accounting Policies [Line Items]                      
Useful life measured as period of time, intangible assets other than goodwill             3 years        
Computer software                      
Disclosure Of Significant Accounting Policies [Line Items]                      
Useful life measured as period of time, intangible assets other than goodwill             3 years        
RSU                      
Disclosure Of Significant Accounting Policies [Line Items]                      
Vesting period     3 years       3 years        
Performance Options                      
Disclosure Of Significant Accounting Policies [Line Items]                      
Vesting period             3 years 2 years      
Minimum | Interest Rate Cap | Interest rate risk                      
Disclosure Of Significant Accounting Policies [Line Items]                      
Derivative instrument mitigation risk percentage             65.00% 65.00%      
Minimum | Land permits                      
Disclosure Of Significant Accounting Policies [Line Items]                      
Original contractual lease term             10 years        
Lease contractual term             1 year        
Minimum | Offices And Other Assets                      
Disclosure Of Significant Accounting Policies [Line Items]                      
Lease contractual term             1 year        
Minimum | Cars And Software                      
Disclosure Of Significant Accounting Policies [Line Items]                      
Lease contractual term             1 year        
Minimum | Performance Options                      
Disclosure Of Significant Accounting Policies [Line Items]                      
Vesting period             2 years        
Maximum | Land permits                      
Disclosure Of Significant Accounting Policies [Line Items]                      
Original contractual lease term             15 years        
Lease contractual term             15 years        
Maximum | Offices And Other Assets                      
Disclosure Of Significant Accounting Policies [Line Items]                      
Lease contractual term             12 years        
Maximum | Cars And Software                      
Disclosure Of Significant Accounting Policies [Line Items]                      
Lease contractual term             4 years        
Maximum | Performance Options                      
Disclosure Of Significant Accounting Policies [Line Items]                      
Vesting period             3 years        
Renewed facility                      
Disclosure Of Significant Accounting Policies [Line Items]                      
Increasing total existing available facility   € 230,000,000                  
Notional amount   € 400,000,000                  
Derivatives to hedge by interest rate risk             65.00% 67.00%      
Proceeds from borrowings             € 150,000,000        
Interest rate             3.90%        
Renewed facility | Borrowings                      
Disclosure Of Significant Accounting Policies [Line Items]                      
Interest rate             3.90%        
Renewed facility | Minimum                      
Disclosure Of Significant Accounting Policies [Line Items]                      
Strike price percentage   0.0150                  
Renewed facility | Maximum                      
Disclosure Of Significant Accounting Policies [Line Items]                      
Strike price percentage   0.0343                  
Renewed facility | Financing And Refinancing Capital Expenditures                      
Disclosure Of Significant Accounting Policies [Line Items]                      
Notional amount   € 200,000,000                  
Renewed facility | Issuance Of Guarantees And Letters Of Credit                      
Disclosure Of Significant Accounting Policies [Line Items]                      
Notional amount   30,000,000                  
Proceeds from borrowings             € 10,712,000 € 12,500,000      
Senior Debt Bank Facility                      
Disclosure Of Significant Accounting Policies [Line Items]                      
Repayments of borrowings, classified as financing activities   170,000,000   € 170,000,000              
Guarantee Facility | More than one year                      
Disclosure Of Significant Accounting Policies [Line Items]                      
Undrawn borrowing facilities             € 326,000 € 17,500,000      
Convertible instruments                      
Disclosure Of Significant Accounting Policies [Line Items]                      
Interest rate 15.00%                 15.00%  
Convertible instruments | Borrowings                      
Disclosure Of Significant Accounting Policies [Line Items]                      
Interest rate             15.00%        
Renewed facility                      
Disclosure Of Significant Accounting Policies [Line Items]                      
Proceeds from borrowings             € 8,390,000        
Covenant break remedy period 10 days                    
Covenant repair consecutive opportunities | day 2                    
Covenant break total opportunities | remedy 4                    
Number of financial covenants | covenant             2        
Number of drawstops events | event             3        
Renewed facility | Interest Rate Cap | Interest rate risk                      
Disclosure Of Significant Accounting Policies [Line Items]                      
Derivative instrument mitigation risk percentage               85.00%      
Renewed facility | More than one year                      
Disclosure Of Significant Accounting Policies [Line Items]                      
Undrawn borrowing facilities             € 0 € 8,390,000      
Renewed facility | Issuance Of Guarantees And Letters Of Credit                      
Disclosure Of Significant Accounting Policies [Line Items]                      
Notional amount   € 30,000,000         € 29,674,000 € 12,500,000      
Testing period   6 months                  
Testing deferral period   12 months