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Convertible promissory notes - Additional Information (Detail) - USD ($)
9 Months Ended 12 Months Ended
Sep. 18, 2024
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Line of Credit Facility [Line Items]        
Debt discount   $ 0 $ 374,406 $ 0
Fair value of warrants associated with convertible notes payable   $ 6,520,056    
Note Warrant [Member]        
Line of Credit Facility [Line Items]        
Aggregate principal amount $ 4,000,000      
Conversion price $ 3.8      
Percentage of aggregate principal amount 50.00%      
2024 Warrant [Member]        
Line of Credit Facility [Line Items]        
Warrants exercise price $ 5.7      
Warrants expire period 3 years      
Fair value of warrants associated with convertible notes payable $ 6,520,056      
Convertable Promissory Note [Member]        
Line of Credit Facility [Line Items]        
Aggregate amount $ 31,253,000      
Interest rate 20.00%      
Maturity, description   second anniversary of the issuance date    
Debt discount $ 2,539,227