v3.26.1
Other revenues and expenses - Research and Development Expense and Tax Credit Receivable (Details) - USD ($)
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Analysis of income and expense [abstract]      
Receivables from taxes other than income tax $ 6,295,000    
Research and development costs 37,018,000 $ 47,566,000 $ 53,018,000
Research tax credit (1,714,000) (3,821,000) (5,374,000)
Government and other grants (4,062,000) (1,939,000) (1,834,000)
Development costs capitalized (*) (120,000) (15,485,000) (22,328,000)
Amortization of capitalized development costs 61,000 2,206,000 2,642,000
Total research and development expense 31,183,000 28,527,000 26,124,000
Research tax credit   (1,371,000) (2,145,000)
Common [Table]      
Receivables from taxes other than income tax 6,295,000    
Capitalized Research And Development Costs 120,000 15,485,000 22,328,000
Research Tax Credit 2023      
Analysis of income and expense [abstract]      
Receivables from taxes other than income tax 1,437,000 4,343,000 133,000
Common [Table]      
Receivables from taxes other than income tax $ 1,437,000 $ 4,343,000 $ 133,000