v3.26.1
Note 18 - Sale of Spanish Subsidiaries (Details Textual)
$ in Thousands
1 Months Ended 12 Months Ended
Mar. 31, 2025
USD ($)
Dec. 31, 2025
USD ($)
Dec. 31, 2024
USD ($)
Mar. 25, 2025
EUR (€)
Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal   $ 15,513 $ 0  
Alternus Energy Group Plc [Member] | Alt Spain Hold Shares [Member]        
Disposal Group, Including Discontinued Operation, Consideration | €       € 10
Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal $ 3,500      
Disposal Group, Not Discontinued Operation, Costs Associated with Sale $ 600