Income taxes (Narrative) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024
Operating Loss Carryforwards [Line Items]
Domestic provincial income taxes attributable to Ontario rate	11.50%
Domestic provincial income taxes	$ 0
Federal statutory income tax rate	15.00%
Research and development tax credits	$ 210,610	$ 242,190
Non-capital losses carry forward - Canada	$ 20,099,000
US [Member]
Operating Loss Carryforwards [Line Items]
Federal statutory income tax rate	21.00%
Research and development tax credits	$ 210,606
Net operating losses carryforward	20,949,000
Operating loss carryforwards subject to expiration	1,253,000
Operating loss carryforwards not subject to expiration	19,696,000
Additional net operating losses carry forward	$ 20,949,000