Notes payable (Details) - USD ($)	Dec. 31, 2024	Dec. 31, 2023
Debt Disclosure [Abstract]
Convertible promissory note	$ 320,000	$ 320,000
Less debt discount	0	0
Accrued interest	64,000	33,000
Promissory notes	103,075	103,075
Subtotal	487,075	456,075
Less current portion	(487,075)	(456,075)
Long-term portion	$ 0	$ 0