Stockholders' equity (Details) - USD ($)	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Allocated share-based compensation expense	$ 188,237	$ 211,122
Cost of Sales [Member]
Allocated share-based compensation expense
Research and Development Expense [Member]
Allocated share-based compensation expense	25,856	70,364
General and Administrative Expense [Member]
Allocated share-based compensation expense	157,984	105,832
Selling and Marketing Expense [Member]
Allocated share-based compensation expense	$ 4,397	$ 34,926