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Notes payable (Details) - USD ($)
Jun. 30, 2024
Dec. 31, 2023
Debt Disclosure [Abstract]    
Convertible promissory note $ 290,000 $ 290,000
Promissory notes 30,000 30,000
Subtotal 320,000 320,000
Less current portion (320,000) (320,000)
Long-term portion $ 0 $ 0