Current report of foreign issuer pursuant to Rules 13a-16 and 15d-16 Amendments

Basis of preparation and changes to the Group's accounting policies - Additional Information (Detail)

v3.23.3
Basis of preparation and changes to the Group's accounting policies - Additional Information (Detail)
Sep. 30, 2023
EUR (€)
Jun. 30, 2023
EUR (€)
Dec. 31, 2022
EUR (€)
Dec. 19, 2022
EUR (€)
instrument
Sep. 30, 2022
EUR (€)
Dec. 31, 2021
EUR (€)
Disclosure Of Significant Accounting Policies [Line Items]            
Equity € (48,826,000)   € 27,758,000   € 70,430,000 € (76,651,000)
Cash and cash equivalents 28,829,000   83,022,000   € 16,398,000 € 24,652,000
Non-current portion of non-current borrowings 312,160,000   269,033,000      
Lease liabilities 69,491,000   51,324,000      
Trade and other current payables 53,755,000   56,390,000      
Borrowings € 312,160,000   € 269,033,000      
Interest Rate Cap            
Disclosure Of Significant Accounting Policies [Line Items]            
Notional amount       € 237,458,000    
Interest Rate Cap            
Disclosure Of Significant Accounting Policies [Line Items]            
Number of interest rates caps | instrument       2    
Bottom of range | Interest rate risk | Interest Rate Cap            
Disclosure Of Significant Accounting Policies [Line Items]            
Derivative instrument mitigation risk percentage 0.65%   0.65%      
Top of range | Interest rate risk | Interest Rate Cap            
Disclosure Of Significant Accounting Policies [Line Items]            
Derivative instrument mitigation risk percentage 0.74%   0.85%      
Senior debt            
Disclosure Of Significant Accounting Policies [Line Items]            
Increasing total existing available facility     € 50,000,000      
Undrawn borrowing facilities € 77,390,000   120,790,000      
Borrowings 0   0      
Renewed facility            
Disclosure Of Significant Accounting Policies [Line Items]            
Increasing total existing available facility     230,000,000 € 230,000,000    
Notional amount     400,000,000 € 400,000,000    
Borrowings € 312,160,000 € 322,610,000 € 269,033,000