Stock-based compensation (Tables)

3 Months Ended

Mar. 31, 2026

Share-based Payment Arrangement [Abstract]

Schedule of stock option activity [Table Text Block]

	Number of options		Weighted average exercise price $	Weighted average remaining contractual life (years)	Aggregate intrinsic value $
Outstanding at December 31, 2024	1,185,000		1.47	4.18	1.18
Outstanding at March 31, 2025	1,185,000		1.43	3.94	1.15
Exercisable at March 31, 2025	927,500		1.02	3.59	1.57
Unvested at March 31, 2025	257,500		2.56	4.69	0.03
Outstanding at December 31, 2025	2,505,000		2.05	2.75	-
Granted	975,000		0.50	4.31	-
Forfeited	(45,000	)	1.79	-	-
Outstanding at March 31, 2026	3,435,000		1.61	4.18	-
Exercisable at March 31, 2026	1,608,750		1.92	3.50	-
Unvested at March 31, 2026	1,826,250		1.33	4.79	-

Schedule of assumptions used to estimate the fair value of options [Table Text Block]

	March 31, 2026 Weighted-average
Exercise price	0.50
Share price	0.41
Dividend	-
Risk-free interest rate	3.97%
Estimated life (in years)	5
Expected volatility	89.44%