Related party transactions (Narrative) (Details) - RBx Capital, LP ("RBx") [Member] - USD ($)		1 Months Ended	3 Months Ended		9 Months Ended
	Oct. 18, 2023	Dec. 31, 2024	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Related Party Transaction [Line Items]
Reimbursable salaries	$ 125,000	$ 100,000	$ 300,000	$ 375,000	$ 900,000	$ 1,050,000
Additional expenses			128,879	$ 36,829	233,790	$ 161,007
Total amount of accounts payable		$ 142,459	$ 143,080		$ 143,080