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Related party transactions - Loan from significant shareholder, officer and director - Benjamin Klein (Details) - Klein Note - USD ($)
3 Months Ended
Jul. 14, 2022
Mar. 31, 2024
Mar. 31, 2023
Dec. 31, 2023
Related party transactions        
Aggregate principal amount $ 2,090,264 $ 0   $ 0
Interest rate 10.00%      
Benjamin Klein        
Related party transactions        
Interest expense   $ 0 $ 62,885