v3.25.2
Summary of Significant Accounting Policies - Concentrations (Details) - Supplier concentration risk - item
6 Months Ended 12 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Dec. 31, 2024
Accounts payable      
Concentrations      
Number of suppliers 2   2
Accounts payable | Two suppliers      
Concentrations      
Concentration risk percentage     55.00%
Accounts payable | Three suppliers      
Concentrations      
Concentration risk percentage 56.00%    
Expenditure | Five suppliers      
Concentrations      
Concentration risk percentage 28.00% 45.00%  
Number of suppliers 5 5  
Expenditure | Ten suppliers      
Concentrations      
Concentration risk percentage 37.00% 55.00%  
Number of suppliers 10 10