Income taxes - Components of Deferred Taxes (Details) - USD ($)	Dec. 31, 2023	Dec. 31, 2022
Deferred tax assets:
Net operating loss carryforward	$ 41,784,757	$ 38,839,281
Stock compensation	3,955,371	2,309,828
Amortization	56,882	118,259
Capitalized R&D costs	3,487,955	2,362,347
Fixed assets	3,574
Accrued expenses	155,320
Gross deferred tax assets	49,443,859	43,629,715
Valuation allowance	(49,443,859)	(43,629,689)
Total deferred tax assets		26
Deferred tax liabilities:
Fixed assets		(26)
Total deferred tax liabilities		(26)
Net deferred tax assets (liabilities)	$ 0	$ 0