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

Other financial assets - Additional Information (Detail)

v3.22.2.2
Other financial assets - Additional Information (Detail) - EUR (€)
€ in Thousands
 1 Months Ended 6 Months Ended 12 Months Ended
Sep. 28, 2021
Jul. 28, 2021
Mar. 26, 2021
Dec. 31, 2019
Jun. 30, 2022
Jun. 30, 2021
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Jun. 07, 2022
May 13, 2019
Schedule Of Assets Pledged As Security [Line Items]                      
Non current pledged bank balance         € 13,000            
Non current payables of interest and commitment fee         18,247   € 17,257 € 14,694      
Non-current trade payables         430   430 430      
Pledged Bank balance for security         1,200   € 1,200 1,200      
Percentage of voting equity interests acquired     100.00%       100.00%        
Share premium contribution         369,851   € 61,888 36,947     € 6,089
Interest expense             386        
Gains on change in fair value of derivatives         2,060 € 147 593        
Losses on change in fair value of derivatives               208 € 75    
Credit derivative, fair value         2,754   695 102      
Payment for purchase of share capital     € 60,000                
The Target Company [Member]                      
Schedule Of Assets Pledged As Security [Line Items]                      
Consideration paid (received)     1,500                
Consideration transferred     30,300       3,200 0      
Option Agreement ,Maturity Date Feb. 28, 2022                    
Gain loss on fair value of options             1,700        
Third Party Company [Member]                      
Schedule Of Assets Pledged As Security [Line Items]                      
Consideration transferred     100                
Mega E [Member]                      
Schedule Of Assets Pledged As Security [Line Items]                      
Percentage of voting equity interests acquired   100.00%                  
Consideration paid (received)   € 0   € 0              
Consideration transferred         34,256   27,200 0      
Gain loss on fair value of options   26,000     7,056 0 1,200        
Share premium contribution   0         0        
Payment for purchase of call options   € 9,456                  
Modélisation, Mesures et Applications S.A [member]                      
Schedule Of Assets Pledged As Security [Line Items]                      
Consideration transferred     100   0   € 3,200     € 0  
Option Agreement ,Maturity Date Feb. 28, 2022                    
Gain loss on fair value of options         € 3,200 € 230          
Payment for purchase of share capital     € 60,000                
Voltalis [member]                      
Schedule Of Assets Pledged As Security [Line Items]                      
Percentage of voting equity interests acquired         16.00%   0.00%        
Fair value of investments in equity instruments         € 41,984   € 0        
Fair value gain or loss has been recognised         0            
Two Option Agreement [Member] | The Target Company [Member]                      
Schedule Of Assets Pledged As Security [Line Items]                      
Percentage of voting equity interests acquired     8.50%                
Percentage of remaining share capital acquired upon exercising its option rights     49.50%                
Two Option Agreement [Member] | Third Party Company [Member]                      
Schedule Of Assets Pledged As Security [Line Items]                      
Percentage of voting equity interests acquired     100.00%                
Two Option Agreement [Member] | Modélisation, Mesures et Applications S.A [member]                      
Schedule Of Assets Pledged As Security [Line Items]                      
Percentage of voting equity interests acquired     8.50%                
Percentage of remaining share capital acquired upon exercising its option rights     49.50%                
Two Option Agreement [Member] | Top of range [member] | The Target Company [Member]                      
Schedule Of Assets Pledged As Security [Line Items]                      
Percentage of voting equity interests acquired     42.00%                
Two Option Agreement [Member] | Top of range [member] | Modélisation, Mesures et Applications S.A [member]                      
Schedule Of Assets Pledged As Security [Line Items]                      
Percentage of voting equity interests acquired     42.00%                
Two separate share and sale purchase agreements [Member] | Modélisation, Mesures et Applications S.A [member]                      
Schedule Of Assets Pledged As Security [Line Items]                      
Percentage of voting equity interests acquired                   100.00%  
Later than three months [member]                      
Schedule Of Assets Pledged As Security [Line Items]                      
Payment of interest and commitment fees         990   2,563        
Later than one year [member]                      
Schedule Of Assets Pledged As Security [Line Items]                      
Non current pledged bank balance         19,877   18,887 € 16,324      
Later than three months and not later than one year [member]                      
Schedule Of Assets Pledged As Security [Line Items]                      
Non current pledged bank balance         € 0   € 0