v3.26.3
Consolidated Statement of (Loss)/Profit and Other Comprehensive (loss)/ Income
€ in Thousands
 12 Months Ended
Dec. 31, 2025
EUR (€)
€ / shares
Dec. 31, 2024
EUR (€)
€ / shares
Dec. 31, 2023
EUR (€)
€ / shares
IncomeStatementLineItems [Line Items]      
Revenue € 14,415 € 1,605 € 4,144
Cost of sales     (20,088)
Gross profit (loss) 4,180 437 (15,944)
Operating expenses      
Other income 1,358 881 199
Administration expenses (11,696) (16,460) (15,835)
Research and development expense     (1,925)
Share-based payment (expense)/ credit (1,562) (2,189) (1,393)
Impairment expense     (2,165)
Operating loss (8,782) (17,330) (37,063)
Net finance income      
Finance income     51
Interest payable and similar expense (24) (525) 58
Finance costs     (544)
Derivative financial instruments at FVTPL     6,886
Net finance income/ (costs)     6,451
Share of losses of equity-accounted investees     (245)
Exceptional items:      
Profit / (loss) on deconsolidation due to insolvency 1,225 1,846  
(Loss) / profit before tax (5,072) (15,254) (30,857)
Income tax credit / (expense)     (159)
(Loss) / profit for the year (4,980) (15,279) (31,016)
Exchange differences on translating foreign operations    
Total comprehensive (loss) / income for the year (7,269) (15,279) (31,016)
Less: net (income) / loss attributable to non controlling interest    
Net income / (loss) attributable to HTOO stockholders (5,720) (15,300)  
Less: total comprehensive (income) / loss attributable to non controlling interest    
Basic (loss)/ earnings per share | (per share)     € (74.11)
Diluted (loss)/ earnings per share | (per share)     € (74.11)
Currently stated [member]      
IncomeStatementLineItems [Line Items]      
Revenue 14,415 1,605  
Cost of sales (10,235) (1,168)  
Gross profit (loss) 4,180 437  
Operating expenses      
Other income 1,358 881  
Administration expenses (11,696) (16,460)  
Research and development expense  
Share-based payment (expense)/ credit (1,562) (2,189)  
Impairment expense (1,062)  
Operating loss (8,782) (17,330)  
Net finance income      
Finance income (883) 293  
Interest payable and similar expense (24) (525)  
Finance costs  
Derivative financial instruments at FVTPL 3,392 462  
Net finance income/ (costs) 2,485 230  
Share of losses of equity-accounted investees  
Exceptional items:      
Profit / (loss) on deconsolidation due to insolvency 1,225 1,846  
(Loss) / profit before tax (5,072) (15,254)  
Income tax credit / (expense) 92 (25)  
(Loss) / profit for the year (4,980) (15,279)  
Exchange differences on translating foreign operations (2,289)  
Total comprehensive (loss) / income for the year (7,269) (15,279)  
Less: net (income) / loss attributable to non controlling interest 874 (54)  
Net income / (loss) attributable to HTOO stockholders (4,106) (15,333)  
Less: total comprehensive (income) / loss attributable to non controlling interest 1,516 (54)  
Total comprehensive (loss) / income attributable to HTOO stockholders € (5,753) € (15,333)  
Basic (loss)/ earnings per share | (per share) € (3.07) € (29.05)  
Diluted (loss)/ earnings per share | (per share) € (3.07) € (29.05)