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

Revenue from contracts with customers - Summary of the Disaggregation of the Group's Revenue from Contracts with Customers (Detail)

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Revenue from contracts with customers - Summary of the Disaggregation of the Group's Revenue from Contracts with Customers (Detail) - EUR (€)
€ in Thousands
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Disclosure of disaggregation of revenue from contracts with customers [line items]      
Revenue from contracts with customers € 190,056 € 145,453 € 133,900
Services transferred over time      
Disclosure of disaggregation of revenue from contracts with customers [line items]      
Revenue from contracts with customers 55,041 32,337 34,968
Goods and services transferred at a point in time      
Disclosure of disaggregation of revenue from contracts with customers [line items]      
Revenue from contracts with customers 135,015 113,116 98,932
Charging sessions      
Disclosure of disaggregation of revenue from contracts with customers [line items]      
Revenue from contracts with customers 123,997 103,265 65,347
Service revenue from the sale of charging equipment      
Disclosure of disaggregation of revenue from contracts with customers [line items]      
Revenue from contracts with customers 13,879 10,303 33,585
Service revenue from installation services      
Disclosure of disaggregation of revenue from contracts with customers [line items]      
Revenue from contracts with customers 37,359 20,391 28,630
Service revenue from operation and maintenance of charging equipment      
Disclosure of disaggregation of revenue from contracts with customers [line items]      
Revenue from contracts with customers 8,529 5,399 3,230
Service revenue from consulting services      
Disclosure of disaggregation of revenue from contracts with customers [line items]      
Revenue from contracts with customers € 6,292 € 6,095 € 3,108