v3.26.3
Property and equipment, net - Depreciation expenses on property and equipment (Details) - USD ($)
$ in Thousands
 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Property and equipment, net    
Total depreciation expenses $ 3,766 $ 3,534
Location, Statement of Income, Balance [Axis]: us-gaap:CostOfGoodsAndServicesSold    
Property and equipment, net    
Total depreciation expenses 1,482 693
Location, Statement of Income, Balance [Axis]: us-gaap:ResearchAndDevelopmentExpense    
Property and equipment, net    
Total depreciation expenses 1,470 1,858
Location, Statement of Income, Balance [Axis]: us-gaap:SellingGeneralAndAdministrativeExpense    
Property and equipment, net    
Total depreciation expenses $ 814 $ 983