v3.26.1
Bonds, mortgages and other long-term debt - Bpifrane Innovation Loan (Details)
5 Months Ended 12 Months Ended
Jun. 30, 2022
EUR (€)
installment
Dec. 31, 2025
USD ($)
Dec. 31, 2025
EUR (€)
Dec. 31, 2025
USD ($)
Dec. 31, 2024
USD ($)
Dec. 31, 2023
USD ($)
Dec. 31, 2025
EUR (€)
Debt Instrument [Line Items]              
Noncurrent debt portion   $ 989,000   $ 989,000     € 842,000
Current portion of debt   689,000   689,000     586,000
Effective interest expense | $       223,000 $ 1,003,000 $ 689,000  
Bpifrance Innovation Loan              
Debt Instrument [Line Items]              
Effective interest rate (in%) 5.25%            
Noncurrent debt portion   318,633   318,633     271,255
Current portion of debt   84,635   84,635     72,050
Effective interest expense   12,381 € 10,618        
Bpifrance Innovation Loan | IC'Alps SAS              
Debt Instrument [Line Items]              
Debt amount granted € 500,000            
Debt term 7 years            
Fixed interest rate (in %) 4.29%            
Bpifrance Innovation R&D Loan | IC'Alps SAS              
Debt Instrument [Line Items]              
Debt amount granted € 500,000            
Number of equal quarterly debt repayment installments | installment 31            
Fixed interest rate (in %) 2.06%            
Noncurrent debt portion   381,765   381,765     325,000
Current portion of debt   117,466   $ 117,466     € 100,000
Effective interest expense   $ 5,555 € 4,764