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Warrant liabilities - Key Assumptions In Valuation (Details) - Total - Level 3 - Recurring fair value measurement - Income approach
Dec. 31, 2025
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Dividend yield  
Disclosure Of Warranty Liabilities [Line Items]  
Significant unobservable inputs 0
Bottom | Exercise price  
Disclosure Of Warranty Liabilities [Line Items]  
Significant unobservable inputs 16.08
Bottom | Expected volatility  
Disclosure Of Warranty Liabilities [Line Items]  
Significant unobservable inputs 0.87
Bottom | Risk-free interest rate  
Disclosure Of Warranty Liabilities [Line Items]  
Significant unobservable inputs 0.036
Bottom | Expected term (years)  
Disclosure Of Warranty Liabilities [Line Items]  
Significant unobservable inputs 2.25
Top of range | Exercise price  
Disclosure Of Warranty Liabilities [Line Items]  
Significant unobservable inputs 32.16
Top of range | Expected volatility  
Disclosure Of Warranty Liabilities [Line Items]  
Significant unobservable inputs 0.89
Top of range | Risk-free interest rate  
Disclosure Of Warranty Liabilities [Line Items]  
Significant unobservable inputs 0.037
Top of range | Expected term (years)  
Disclosure Of Warranty Liabilities [Line Items]  
Significant unobservable inputs 4.83