v3.26.1
Bonds, mortgages and other long-term debt - PGE loan - CIC Lyonnaise de Banque (Details)
5 Months Ended 12 Months Ended
May 15, 2021
Dec. 31, 2025
USD ($)
Dec. 31, 2025
EUR (€)
Dec. 31, 2025
USD ($)
Dec. 31, 2024
USD ($)
Dec. 31, 2023
USD ($)
Dec. 31, 2025
EUR (€)
May 12, 2020
EUR (€)
Bonds, mortgages and other long-term debt                
Current portion of debt   $ 689,000   $ 689,000     € 586,000  
Effective interest expense | $       223,000 $ 1,003,000 $ 689,000    
PGE loans (CIC Lyonnaise de Banque)                
Bonds, mortgages and other long-term debt                
Current portion of debt   74,340   $ 74,340     € 63,287  
Effective interest expense   $ 344 € 295          
PGE loans (CIC Lyonnaise de Banque) | IC'Alps SAS                
Bonds, mortgages and other long-term debt                
Debt amount granted | €               € 600,000
Debt term 60 months              
Fixed interest rate (in %) 0.70%