v3.26.1
Equity - Schedule of other reserves (Details) - EUR (€)
€ in Thousands
 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Disclosure of reserves within equity [line items]    
Other reserves, at beginning of period € 83,318  
Currency translation differences (387) € 1,402
Defined benefit plan actuarial gains/(losses) 7 24
Share-based compensation expense 3,363 4,498
Other reserves, at end of period 90,532  
Other reserves    
Disclosure of reserves within equity [line items]    
Other reserves, at beginning of period 83,318 73,203
Currency translation differences (387) 1,402
Defined benefit plan actuarial gains/(losses) 7 24
Share-based compensation expense 3,363 4,498
Capital increase with share warrant 4,231 0
Other reserves, at end of period 90,532 79,126
Other regulated reserves    
Disclosure of reserves within equity [line items]    
Other reserves, at beginning of period 52,820 52,820
Currency translation differences 0 0
Defined benefit plan actuarial gains/(losses) 0 0
Share-based compensation expense 0 0
Capital increase with share warrant 0 0
Other reserves, at end of period 52,820 52,820
Other comprehensive income    
Disclosure of reserves within equity [line items]    
Other reserves, at beginning of period (2,563) (3,151)
Currency translation differences (387) 1,402
Defined benefit plan actuarial gains/(losses) 7 24
Share-based compensation expense 0 0
Capital increase with share warrant 0 0
Other reserves, at end of period (2,943) (1,725)
Treasury shares    
Disclosure of reserves within equity [line items]    
Other reserves, at beginning of period (645) (645)
Currency translation differences 0 0
Defined benefit plan actuarial gains/(losses) 0 0
Share-based compensation expense 0 0
Capital increase with share warrant 0 0
Other reserves, at end of period (645) (645)
Capital from Share-based compensation    
Disclosure of reserves within equity [line items]    
Other reserves, at beginning of period 43,224 33,696
Currency translation differences 0 0
Defined benefit plan actuarial gains/(losses) 0 0
Share-based compensation expense 3,363 4,498
Capital increase with share warrant 0 0
Other reserves, at end of period 46,586 38,194
Warrant reserve    
Disclosure of reserves within equity [line items]    
Other reserves, at beginning of period 0 0
Currency translation differences 0 0
Defined benefit plan actuarial gains/(losses) 0 0
Share-based compensation expense 0 0
Capital increase with share warrant 4,231 0
Other reserves, at end of period 4,231 0
Other revenue reserves    
Disclosure of reserves within equity [line items]    
Other reserves, at beginning of period (9,517) (9,517)
Currency translation differences 0 0
Defined benefit plan actuarial gains/(losses) 0 0
Share-based compensation expense 0 0
Capital increase with share warrant 0 0
Other reserves, at end of period € (9,517) € (9,517)