Capital stock (Details 1) - Number of Common Shares |
12 Months Ended | ||
|---|---|---|---|
|
Dec. 31, 2025
$ / shares
|
Dec. 31, 2024
$ / shares
|
Dec. 31, 2023
$ / shares
|
|
| Statement [Line Items] | |||
| Balance, beginning of year | 1,237,700 | 1,477,700 | 638,400 |
| Granted | 40,000 | 0 | 1,205,000 |
| Exercised | 0 | (185,000) | |
| Forfeited, cancelled or expired | (115,700) | (240,000) | (180,700) |
| Balance, end of year | 1,162,000 | 1,237,700 | 1,477,700 |
| Options exercisable, end of period | 582,000 | 385,700 | 332,700 |
| Weighted average exercise price, beginning of year | $ 1.72 | $ 1.72 | $ 3.05 |
| Weighted average exercise price, Granted | 1.25 | 0 | 1.25 |
| Weighted average exercise price, Exercised | 0 | 0.30 | |
| Weighted average exercise price, Forfeited, cancelled or expired | (1.55) | (4.02) | (4.76) |
| Weighted average exercise price, end of period | 1.24 | 1.27 | 1.72 |
| Weighted average exercise price, exercisable | $ 1.23 | $ 1.31 | $ 3.32 |