v3.25.4
Details of Significant Accounts - Intangible assets, schedule of intangible assets (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Reconciliation of changes in intangible assets other than goodwill [abstract]      
Opening net book amount $ 32 $ 77  
Additions   6  
Amortization charge (145) (51) $ (75)
Impairment loss (1,965)    
Closing net book amount 4,421 32 77
Goodwill      
Reconciliation of changes in intangible assets other than goodwill [abstract]      
Opening net book amount 0    
Impairment loss (1,965)    
Closing net book amount 2,774 0  
Unpatented technology      
Reconciliation of changes in intangible assets other than goodwill [abstract]      
Opening net book amount 0    
Amortization charge (117)    
Impairment loss 0    
Closing net book amount 1,643 0  
Software      
Reconciliation of changes in intangible assets other than goodwill [abstract]      
Opening net book amount 29 69  
Additions   6  
Amortization charge (25) (46)  
Impairment loss 0    
Closing net book amount 4 29 69
Other intangible assets      
Reconciliation of changes in intangible assets other than goodwill [abstract]      
Opening net book amount 3 8  
Additions   0  
Amortization charge (3) (5)  
Impairment loss 0    
Closing net book amount 0 3 8
Cost      
Reconciliation of changes in intangible assets other than goodwill [abstract]      
Opening net book amount 129 226  
Acquired from business combinations 6,499    
Disposals (58) (103)  
Closing net book amount 6,570 129 226
Cost | Goodwill      
Reconciliation of changes in intangible assets other than goodwill [abstract]      
Opening net book amount 0    
Acquired from business combinations 4,739    
Disposals 0    
Closing net book amount 4,739 0  
Cost | Unpatented technology      
Reconciliation of changes in intangible assets other than goodwill [abstract]      
Opening net book amount 0    
Acquired from business combinations 1,760    
Disposals 0    
Closing net book amount 1,760 0  
Cost | Software      
Reconciliation of changes in intangible assets other than goodwill [abstract]      
Opening net book amount 114 137  
Acquired from business combinations 0    
Disposals (43) (29)  
Closing net book amount 71 114 137
Cost | Other intangible assets      
Reconciliation of changes in intangible assets other than goodwill [abstract]      
Opening net book amount 15 89  
Acquired from business combinations 0    
Disposals (15) (74)  
Closing net book amount 0 15 89
Accumulated depreciation      
Reconciliation of changes in intangible assets other than goodwill [abstract]      
Opening net book amount (97) (149)  
Disposals 58 103  
Closing net book amount   (97) (149)
Accumulated depreciation | Goodwill      
Reconciliation of changes in intangible assets other than goodwill [abstract]      
Opening net book amount 0    
Disposals 0    
Closing net book amount   0  
Accumulated depreciation | Unpatented technology      
Reconciliation of changes in intangible assets other than goodwill [abstract]      
Opening net book amount 0    
Disposals 0    
Closing net book amount   0  
Accumulated depreciation | Software      
Reconciliation of changes in intangible assets other than goodwill [abstract]      
Opening net book amount (85) (68)  
Disposals 43 29  
Closing net book amount   (85) (68)
Accumulated depreciation | Other intangible assets      
Reconciliation of changes in intangible assets other than goodwill [abstract]      
Opening net book amount (12) (81)  
Disposals 15 74  
Closing net book amount   (12) $ (81)
Accumulated amortization and impairment      
Reconciliation of changes in intangible assets other than goodwill [abstract]      
Opening net book amount (97)    
Closing net book amount (2,149) (97)  
Accumulated amortization and impairment | Goodwill      
Reconciliation of changes in intangible assets other than goodwill [abstract]      
Closing net book amount (1,965)    
Accumulated amortization and impairment | Unpatented technology      
Reconciliation of changes in intangible assets other than goodwill [abstract]      
Closing net book amount (117)    
Accumulated amortization and impairment | Software      
Reconciliation of changes in intangible assets other than goodwill [abstract]      
Opening net book amount (85)    
Closing net book amount (67) (85)  
Accumulated amortization and impairment | Other intangible assets      
Reconciliation of changes in intangible assets other than goodwill [abstract]      
Opening net book amount (12)    
Closing net book amount $ 0 $ (12)