Stock-based compensation (Narrative) (Details)	12 Months Ended
	Dec. 31, 2024 USD ($) $ / shares	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($) $ / shares	Dec. 31, 2023 USD ($)
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Limit of options as a percentage of shares outstanding		10.00%
Weighted average grant-date fair value of options granted | $ / shares	$ 2.82		$ 0.73
Weighted average grant-date fair value of options forfeited | $ / shares	$ 2.36
Unrecognized stock-based compensation | $	$ 565,986	$ 565,986	$ 335,812	$ 335,812
Period for recognition		2 years 3 months		4 years 9 months 25 days
Stock-based compensation | $		$ 713,119		$ 98,585