Income taxes (Tables)

12 Months Ended

Dec. 31, 2025

Income taxes

Schedule of components of net loss

	Year ended December 31,
	2025		2024
Foreign	$	(256,019)	$	(218,261)
Domestic		(12,343,550)		(12,740,450)
Net loss	$	(12,599,569)	$	(12,958,711)

Summary of reconciliation of the effect of applying federal statutory rate to the net loss and the effective income tax rate

	Year Ended December 31, 2025
	Amount		Percent
Tax at U.S. statutory rate	$	(2,646,101)	21.0	%
Foreign tax effects
Others		1,024	—	%
Tax credits
Research and development credits		(42,220)	0.3	%
Changes in valuation allowance		2,592,855	(20.6)	%
Nontaxable and nondeductible items		20,946	(0.2)	%
Changes in unrecognized tax benefits
Other adjustments		73,496	(0.5)	%
Effective tax rate	$	—	(0)	%

	Year ended December 31,
	2024
Statutory federal income tax rate	21.0	%
Permanent differences	(0.1)	%
Section 162(m) limitation	—	%
Changes in valuation allowance	(19.7)	%
Other	(1.2)	%
Effective income tax rate	—	%

Summary of significant components of deferred taxes

	December 31,
	2025		2024
Deferred tax assets:
Net operating loss carryforward	$	48,568,167	$	41,058,034
Stock compensation		4,130,337		4,051,018
Amortization		21,883		39,412
Capitalized research and development costs		3,386,699		4,850,529
Fixed Assets		878		981
Research and development credits		42,220		—
Accrued Expenses		199,095		165,558
Gross deferred tax assets		56,349,279		50,165,532
Valuation allowance		(56,349,279)		(50,165,532)
Total deferred tax assets	$	—	$	—