v3.26.1
Summary of significant accounting policies - Property and equipment and intangible assets (Details)
Dec. 31, 2025
Jan. 31, 2024
Trademarks    
Summary of significant accounting policies    
Intangible assets, estimated useful life 10 years  
Developed technology    
Summary of significant accounting policies    
Intangible assets, estimated useful life 10 years 10 years
Minimum | Software    
Summary of significant accounting policies    
Intangible assets, estimated useful life 3 years  
Minimum | Distribution and licensing rights    
Summary of significant accounting policies    
Intangible assets, estimated useful life 3 years  
Minimum | Patent    
Summary of significant accounting policies    
Intangible assets, estimated useful life 3 years  
Maximum | Software    
Summary of significant accounting policies    
Intangible assets, estimated useful life 10 years  
Maximum | Distribution and licensing rights    
Summary of significant accounting policies    
Intangible assets, estimated useful life 10 years  
Maximum | Patent    
Summary of significant accounting policies    
Intangible assets, estimated useful life 10 years  
Machinery and electronic equipment | Minimum    
Summary of significant accounting policies    
Property and equipment, estimated useful life 3 years  
Machinery and electronic equipment | Maximum    
Summary of significant accounting policies    
Property and equipment, estimated useful life 10 years  
Transportation vehicles    
Summary of significant accounting policies    
Property and equipment, estimated useful life 4 years  
Office and other equipment    
Summary of significant accounting policies    
Property and equipment, estimated useful life 5 years