Annual and transition report of foreign private issuers pursuant to Section 13 or 15(d)

Significant accounting estimates, assumptions and judgments - Additional Information (Detail)

v3.23.1
Significant accounting estimates, assumptions and judgments - Additional Information (Detail)
€ / shares in Units, € in Thousands
 12 Months Ended
Jul. 28, 2021
EUR (€)
shares
Dec. 31, 2022
EUR (€)
Dec. 31, 2021
EUR (€)
€ / shares
Dec. 31, 2020
EUR (€)
Dec. 31, 2022
shares
Dec. 31, 2022
€ / shares
Dec. 31, 2022
EUR (€)
Dec. 31, 2022
performance_obligation
Dec. 31, 2022
lease
Jun. 07, 2022
agreement
Apr. 15, 2022
€ / shares
Mar. 22, 2022
€ / shares
Mar. 16, 2022
€ / shares
shares
Apr. 30, 2021
Mar. 26, 2021
agreement
Disclosure Of Significant Accounting Estimates Assumptions And Judgements [Line Items]                              
Number of shares issued in transaction (in shares) | shares 15,000,000                            
Par value per share (in EUR per share) | € / shares                     € 0.12 € 0.12 € 0.12    
Class of warrant or right, number of securities called by each warrant or right (in shares) | shares                         1    
Number of leases | lease                 7            
Deferred tax assets     € 570 € 4,573     € 523                
Impairments of property, plant and equipment   € 701 354 466                      
Reversal of impairments   € 679 € 381 0                      
Development Contracts                              
Disclosure Of Significant Accounting Estimates Assumptions And Judgements [Line Items]                              
Number o performance obligations | performance_obligation               2              
Operation And Maintenance Services                              
Disclosure Of Significant Accounting Estimates Assumptions And Judgements [Line Items]                              
Number o performance obligations | performance_obligation               1              
Purchase Option To Acquire MOMA                              
Disclosure Of Significant Accounting Estimates Assumptions And Judgements [Line Items]                              
Number of option agreements entered into | agreement                   2         2
Minimum                              
Disclosure Of Significant Accounting Estimates Assumptions And Judgements [Line Items]                              
Advance review period   18 months                          
Maximum                              
Disclosure Of Significant Accounting Estimates Assumptions And Judgements [Line Items]                              
Advance review period   24 months                          
Chargers                              
Disclosure Of Significant Accounting Estimates Assumptions And Judgements [Line Items]                              
Under utilized margin   95.00% 95.00%                        
Impairments of property, plant and equipment   € 701 € 354 466                      
Reversal of impairments   € 679 381 € 0                      
Goodwill | Cash Flow Period, Measurement Input | Discounted cash flow                              
Disclosure Of Significant Accounting Estimates Assumptions And Judgements [Line Items]                              
Unobservable input, assets   5     5                    
Land permits | Minimum                              
Disclosure Of Significant Accounting Estimates Assumptions And Judgements [Line Items]                              
Lease contractual term   1 year                          
Land permits | Maximum                              
Disclosure Of Significant Accounting Estimates Assumptions And Judgements [Line Items]                              
Lease contractual term   15 years                          
Offices And Other Assets | Minimum                              
Disclosure Of Significant Accounting Estimates Assumptions And Judgements [Line Items]                              
Lease contractual term   1 year                          
Offices And Other Assets | Maximum                              
Disclosure Of Significant Accounting Estimates Assumptions And Judgements [Line Items]                              
Lease contractual term   12 years                          
Cars And Software | Minimum                              
Disclosure Of Significant Accounting Estimates Assumptions And Judgements [Line Items]                              
Lease contractual term   1 year                          
Cars And Software | Maximum                              
Disclosure Of Significant Accounting Estimates Assumptions And Judgements [Line Items]                              
Lease contractual term   4 years                          
Germany And Belgium                              
Disclosure Of Significant Accounting Estimates Assumptions And Judgements [Line Items]                              
Deferred tax assets     570       523                
Amendment To Special Fees Agreement | Consultancy Firm | Madeline                              
Disclosure Of Significant Accounting Estimates Assumptions And Judgements [Line Items]                              
Amendment additional share percentage                           5.00%  
Two Option Agreement | Unlisted Software Company | Top of range                              
Disclosure Of Significant Accounting Estimates Assumptions And Judgements [Line Items]                              
Percentage of acquired                             42.00%
Two Option Agreement | Third Party Company | Purchase Option To Acquire MOMA                              
Disclosure Of Significant Accounting Estimates Assumptions And Judgements [Line Items]                              
Percentage of acquired                             100.00%
Two Option Agreement | Third Party Company | Unlisted Software Company                              
Disclosure Of Significant Accounting Estimates Assumptions And Judgements [Line Items]                              
Percentage of acquired                             100.00%
Computer software                              
Disclosure Of Significant Accounting Estimates Assumptions And Judgements [Line Items]                              
Carrying value of capitalized development costs     € 4,198       € 3,312                
Useful life   3 years                          
Mega-E                              
Disclosure Of Significant Accounting Estimates Assumptions And Judgements [Line Items]                              
Percentage of acquired 100.00%                            
Consideration paid € 9,456                            
Purchase option exercise period 6 months                            
Spartan Merger                              
Disclosure Of Significant Accounting Estimates Assumptions And Judgements [Line Items]                              
Warrants exercise period   30 days                          
MOMA                              
Disclosure Of Significant Accounting Estimates Assumptions And Judgements [Line Items]                              
Percentage of acquired                   100.00%          
The Target Company | Two Option Agreement | Unlisted Software Company                              
Disclosure Of Significant Accounting Estimates Assumptions And Judgements [Line Items]                              
Percentage of acquired                             8.50%
Ordinary Shares                              
Disclosure Of Significant Accounting Estimates Assumptions And Judgements [Line Items]                              
Par value per share (in EUR per share) | € / shares     € 1     € 0.12                  
Ordinary Shares | Public Warrants                              
Disclosure Of Significant Accounting Estimates Assumptions And Judgements [Line Items]                              
Class of warrant or right, number of securities called by each warrant or right (in shares) | shares         1