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Concentrations of risks - Credit Risk (Details)
Dec. 31, 2025
USD ($)
Dec. 31, 2025
EUR (€)
Dec. 31, 2025
INR (₨)
Dec. 31, 2024
USD ($)
Concentration Risk [Line Items]        
Cash $ 1,899,801     $ 4,558,160
Cash, amount uninsured by Taiwan Central Deposit Insurance Corporation 498,062      
Cash, amount uninsured by European Banking Authority 174,591 € 148,403    
Cash, amount uninsured by Kingdom of Cambodia Deposit Insurance Corporation 270,493      
Cash, amount uninsured by Indian Banking Authority 24,705   ₨ 2,219,338  
TAIWAN        
Concentration Risk [Line Items]        
Cash 788,834      
European Union        
Concentration Risk [Line Items]        
Cash 292,238 € 248,403    
CAMBODIA        
Concentration Risk [Line Items]        
Cash 270,493      
INDIA        
Concentration Risk [Line Items]        
Cash 30,270   ₨ 2,719,338  
United States        
Concentration Risk [Line Items]        
Cash 276,577      
Cash, Amount Uninsured by Federal Deposit Insurance Corporation $ 16,944