Stock-based compensation (Narrative) (Details) - USD ($)	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Limit of options as a percentage of shares outstanding	10.00%
Unrecognized stock-based compensation	$ 455,175
Period for recognition	2 years
Stock-based compensation	$ 112,277	$ 35,953