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

Financial risk management - Additional Information (Detail)

v3.25.1
Financial risk management - Additional Information (Detail)
 12 Months Ended
Dec. 31, 2024
EUR (€)
€ / MWh
customer
interest_cap
Dec. 31, 2023
EUR (€)
€ / MWh
customer
interest_cap
Dec. 31, 2027
Dec. 31, 2026
Dec. 31, 2025
Dec. 19, 2022
EUR (€)
interest_cap
Disclosure of Financial Risk Management [Line Items]            
Average expected coverage 78.00% 25.00%        
Borrowings € 512,014,000 € 350,722,000        
Revenue Concentration Risk            
Disclosure of Financial Risk Management [Line Items]            
Concentration of risk revenue number of customers | customer 11 25        
Concentration of risk revenue benchmark € 460,000 € 470,000        
Percentage of entity's revenue 35.00% 78.00%        
Trade Receivables and Contract Assets Concentration Risk            
Disclosure of Financial Risk Management [Line Items]            
Concentration of risk trade receivables and contract assets number of customers | customer 1 2        
Concentration of risk trade receivables and contract assets benchmark € 4,600,000 € 4,700,000        
Concentration of risk trade receivables and contract assets percentage 10.00% 32.00%        
Interest Rate Cap            
Disclosure of Financial Risk Management [Line Items]            
Notional amount   € 240,500,000       € 240,500,000
More than one year            
Disclosure of Financial Risk Management [Line Items]            
Average expected coverage 207.00%          
Interest Rate Cap            
Disclosure of Financial Risk Management [Line Items]            
Number of derivative instruments | interest_cap 2 2       2
Interest Rate Cap | December 2027            
Disclosure of Financial Risk Management [Line Items]            
Notional amount € 240,500,000 € 240,500,000        
Interest rate risk            
Disclosure of Financial Risk Management [Line Items]            
Fixed interest borrowings percentage 29.00% 0.00%        
Interest rate risk | Interest Rate Cap            
Disclosure of Financial Risk Management [Line Items]            
Derivative instrument mitigation risk percentage 65.00% 67.00%        
Derivative instrument strike price percentage 2.97% 3.43%        
Interest rate risk | Interest Rate Cap | Forecast            
Disclosure of Financial Risk Management [Line Items]            
Derivative instrument strike price percentage     2.62% 2.63% 2.64%  
Commodity price risk | Interest Rate Cap            
Disclosure of Financial Risk Management [Line Items]            
Derivative instrument mitigation risk percentage 80.00%          
Commodity price risk | Derivatives | The Netherlands            
Disclosure of Financial Risk Management [Line Items]            
Derivative instrument mitigation risk percentage 91.00% 52.00%        
Average price of hedging instrument | € / MWh 77.29 95.82        
Commodity price risk | Derivatives | Germany            
Disclosure of Financial Risk Management [Line Items]            
Average price of hedging instrument | € / MWh 78.51 95.18