Property and equipment (Details) - USD ($)	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024
Property and equipment
Property and equipment, at cost	$ 153,962	$ 153,962
Less accumulated depreciation and amortization	(94,155)	(72,440)
Property and equipment-net	59,807	81,522
Depreciation expense	21,715	22,318
Lab equipment
Property and equipment
Property and equipment, at cost	148,704	148,704
Computer equipment
Property and equipment
Property and equipment, at cost	$ 5,258	$ 5,258