Post-effective amendment to a registration statement that is not immediately effective upon filing

Share capital, share premium and transaction costs on new equity instruments - Summary of Movement of Share Capital and Share Premium (Detail)

v3.22.2.2
Share capital, share premium and transaction costs on new equity instruments - Summary of Movement of Share Capital and Share Premium (Detail) - EUR (€)
€ / shares in Units, € in Thousands
6 Months Ended 12 Months Ended
Jun. 30, 2022
Apr. 15, 2022
Mar. 22, 2022
Mar. 16, 2022
Jun. 30, 2022
Jun. 30, 2021
Dec. 31, 2021
Disclosure In Tabular Form Of Share Capital Including Premium [Line Items]              
Issued capital, beginning         € 1 € 1 € 1
Issued capital, beginning, shares         100 100 100
Price per share         € 1 € 1 € 1
Transaction costs           € 532 € 1,059
Shareholder loan equity conversion, shares         267,177,592    
Price per share € 0.12            
Issued capital, ending € 32,061       € 32,061   € 1
Issued capital, ending, shares           100 100
Price per share           € 1 € 1
Before cancellation of old shares [member]              
Disclosure In Tabular Form Of Share Capital Including Premium [Line Items]              
Shareholder loan equity conversion, shares         124    
Price per share         € 1    
Exercise of warrants [member] | Private placement warrants [Member]              
Disclosure In Tabular Form Of Share Capital Including Premium [Line Items]              
Shareholder loan equity conversion, shares         1,334,949    
Price per share         € 0.12    
Business Combination Agreement [Member]              
Disclosure In Tabular Form Of Share Capital Including Premium [Line Items]              
Price per share       € 1      
Business Combination Agreement [Member] | Spartan acquisition corporation three [member]              
Disclosure In Tabular Form Of Share Capital Including Premium [Line Items]              
Shareholder loan equity conversion, shares         14,907,582    
Price per share         € 0.12    
Price per share       0.12      
Business Combination Agreement [Member] | Merger of subsidiary with holding company [member]              
Disclosure In Tabular Form Of Share Capital Including Premium [Line Items]              
Shareholder loan equity conversion, shares         235,935,061    
Price per share         € 0.12    
Price per share       € 0.12      
Subscription Agreement [Member] | Private investment in public equity investors [member] | Tranche one [member]              
Disclosure In Tabular Form Of Share Capital Including Premium [Line Items]              
Shareholder loan equity conversion, shares         12,500,000    
Price per share         € 0.12    
Subscription Agreement [Member] | Private investment in public equity investors [member] | Tranche two [member]              
Disclosure In Tabular Form Of Share Capital Including Premium [Line Items]              
Shareholder loan equity conversion, shares         2,500,000    
Price per share         € 0.12    
Madeline [Member]              
Disclosure In Tabular Form Of Share Capital Including Premium [Line Items]              
Shareholder loan equity conversion, shares         2    
Price per share         € 1    
Madeline [Member] | First special fees agreement [member] | External consulting firm [member]              
Disclosure In Tabular Form Of Share Capital Including Premium [Line Items]              
Shareholder loan equity conversion, shares       22 22    
Price per share         € 1    
Issue of equity       € 22      
Issued capital [member] | Business Combination Agreement [Member] | Spartan acquisition corporation three [member]              
Disclosure In Tabular Form Of Share Capital Including Premium [Line Items]              
Issue of equity       1,789      
Issued capital [member] | Business Combination Agreement [Member] | Merger of subsidiary with holding company [member]              
Disclosure In Tabular Form Of Share Capital Including Premium [Line Items]              
Issue of equity       € 28,312      
Issued capital [member] | Madeline [Member] | First special fees agreement [member] | External consulting firm [member]              
Disclosure In Tabular Form Of Share Capital Including Premium [Line Items]              
Price per share       € 1      
Share premium [member]              
Disclosure In Tabular Form Of Share Capital Including Premium [Line Items]              
Transaction costs           € 532 € 1,059
Share premium [member] | Business Combination Agreement [Member] | Spartan acquisition corporation three [member]              
Disclosure In Tabular Form Of Share Capital Including Premium [Line Items]              
Issue of equity       € 86,401      
Share premium [member] | Business Combination Agreement [Member] | Merger of subsidiary with holding company [member]              
Disclosure In Tabular Form Of Share Capital Including Premium [Line Items]              
Issue of equity       € 28,312      
Ordinary shares [member]              
Disclosure In Tabular Form Of Share Capital Including Premium [Line Items]              
Issued capital, beginning         € 100 100 100
Price per share         € 1    
Issued capital, ending € 28,312       € 28,312   € 100
Price per share € 0.12       € 0.12   € 1
Ordinary shares [member] | Exercise of warrants [member] | Private placement warrants [Member]              
Disclosure In Tabular Form Of Share Capital Including Premium [Line Items]              
Shareholder loan equity conversion, shares   1,334,949          
Ordinary shares [member] | Subscription Agreement [Member] | Private investment in public equity investors [member] | Tranche one [member]              
Disclosure In Tabular Form Of Share Capital Including Premium [Line Items]              
Shareholder loan equity conversion, shares       12,500,000      
Ordinary shares [member] | Subscription Agreement [Member] | Private investment in public equity investors [member] | Tranche two [member]              
Disclosure In Tabular Form Of Share Capital Including Premium [Line Items]              
Shareholder loan equity conversion, shares     2,500,000        
Ordinary shares [member] | Issued capital [member]              
Disclosure In Tabular Form Of Share Capital Including Premium [Line Items]              
Issued capital, beginning         € 1 1 € 1
Transaction costs            
Shareholder loan equity conversion, shares       2      
Elimination of old shares shares         (124)    
Elimination of old shares values         € (124)    
Price per share         € 1    
Issued capital, ending € 32,061       € 32,061 1 1
Price per share       € 1      
Ordinary shares [member] | Issued capital [member] | Before cancellation of old shares [member]              
Disclosure In Tabular Form Of Share Capital Including Premium [Line Items]              
Issued capital, ending 124       124    
Ordinary shares [member] | Issued capital [member] | Exercise of warrants [member] | Private placement warrants [Member]              
Disclosure In Tabular Form Of Share Capital Including Premium [Line Items]              
Issue of equity   € 160     160    
Ordinary shares [member] | Issued capital [member] | Business Combination Agreement [Member] | Spartan acquisition corporation three [member]              
Disclosure In Tabular Form Of Share Capital Including Premium [Line Items]              
Issue of equity         1,789    
Ordinary shares [member] | Issued capital [member] | Business Combination Agreement [Member] | Merger of subsidiary with holding company [member]              
Disclosure In Tabular Form Of Share Capital Including Premium [Line Items]              
Issue of equity         28,311    
Ordinary shares [member] | Issued capital [member] | Subscription Agreement [Member] | Private investment in public equity investors [member] | Tranche one [member]              
Disclosure In Tabular Form Of Share Capital Including Premium [Line Items]              
Issue of equity       € 1,500 1,500    
Ordinary shares [member] | Issued capital [member] | Subscription Agreement [Member] | Private investment in public equity investors [member] | Tranche two [member]              
Disclosure In Tabular Form Of Share Capital Including Premium [Line Items]              
Issue of equity     € 300   300    
Ordinary shares [member] | Issued capital [member] | Madeline [Member]              
Disclosure In Tabular Form Of Share Capital Including Premium [Line Items]              
Shareholder loan equity conversion, value         2    
Ordinary shares [member] | Issued capital [member] | Madeline [Member] | First special fees agreement [member] | External consulting firm [member]              
Disclosure In Tabular Form Of Share Capital Including Premium [Line Items]              
Issue of equity         22    
Ordinary shares [member] | Share premium [member]              
Disclosure In Tabular Form Of Share Capital Including Premium [Line Items]              
Issued capital, beginning         61,888 36,947 36,947
Transaction costs           (532)  
Shareholder loan equity conversion, value       101,933      
Elimination of old shares values            
Issue of equity       2      
Issued capital, ending 369,851       369,851 € 36,415 € 61,888
Ordinary shares [member] | Share premium [member] | Before cancellation of old shares [member]              
Disclosure In Tabular Form Of Share Capital Including Premium [Line Items]              
Issued capital, ending € 163,821       163,821    
Ordinary shares [member] | Share premium [member] | Exercise of warrants [member] | Private placement warrants [Member]              
Disclosure In Tabular Form Of Share Capital Including Premium [Line Items]              
Issue of equity   € 13,694     13,694    
Ordinary shares [member] | Share premium [member] | Business Combination Agreement [Member] | Spartan acquisition corporation three [member]              
Disclosure In Tabular Form Of Share Capital Including Premium [Line Items]              
Issue of equity         86,401    
Ordinary shares [member] | Share premium [member] | Business Combination Agreement [Member] | Merger of subsidiary with holding company [member]              
Disclosure In Tabular Form Of Share Capital Including Premium [Line Items]              
Issue of equity         (28,312)    
Ordinary shares [member] | Share premium [member] | Subscription Agreement [Member] | Private investment in public equity investors [member] | Tranche one [member]              
Disclosure In Tabular Form Of Share Capital Including Premium [Line Items]              
Issue of equity       € 111,873 111,873    
Ordinary shares [member] | Share premium [member] | Subscription Agreement [Member] | Private investment in public equity investors [member] | Tranche two [member]              
Disclosure In Tabular Form Of Share Capital Including Premium [Line Items]              
Issue of equity     € 22,375   22,375    
Ordinary shares [member] | Share premium [member] | Madeline [Member]              
Disclosure In Tabular Form Of Share Capital Including Premium [Line Items]              
Shareholder loan equity conversion, value         101,933    
Ordinary shares [member] | Share premium [member] | Madeline [Member] | First special fees agreement [member] | External consulting firm [member]              
Disclosure In Tabular Form Of Share Capital Including Premium [Line Items]              
Issue of equity