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Stock-based compensation (Tables) | 6 Months Ended
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Jun. 30, 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 |
Granted |  | 100,000 |  |  | 2.60 |  |  | 5.00 |  |  | - |
Outstanding at June 30, 2025 |  | 1,285,000 |  |  | 1.56 |  |  | 3.79 |  |  | 1.43 |
Exercisable at June 30, 2025 |  | 980,000 |  |  | 1.25 |  |  | 4.01 |  |  | 1.74 |
Unvested at June 30, 2025 |  | 305,000 |  |  | 2.56 |  |  | 4.44 |  |  | - |
Outstanding at December 31, 2025 |  | 2,505,000 |  |  | 2.05 |  |  | 2.75 |  |  | - |
Granted |  | 3,050,000 |  |  | 0.40 |  |  | 4.87 |  |  | - |
Forfeited |  | (45,000 | ) |  | 1.79 |  |  | - |  |  | - |
Outstanding at June 30, 2026 |  | 5,510,000 |  |  | 1.14 |  |  | 4.32 |  |  | - |
Exercisable at June 30, 2026 |  | 3,435,000 |  |  | 1.62 |  |  | 3.94 |  |  | - |
Unvested at June 30, 2026 |  | 2,075,000 |  |  | 0.36 |  |  | 4.93 |  |  | - |
Schedule of assumptions used to estimate the fair value of options [Table Text Block] |
|  | June 30, 2026 Weighted-average |
Exercise price |  | 0.40 |
Share price |  | 0.37 |
Dividend |  | - |
Risk-free interest rate |  | 4.13% |
Estimated life (in years) |  | 5 |
Expected volatility |  | 76.33% |

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- Definition Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (d) -SubTopic 10 -Topic 718 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (e) -SubTopic 10 -Topic 718 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 718 -SubTopic 10 -Subparagraph (f)(2) -Name Accounting Standards Codification -Paragraph 2 -Section 50 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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