Income taxes - Schedule of temporary difference, unused tax losses and unused tax credits (Detail) - USD ($) |
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
|---|---|---|---|
| Disclosure of temporary difference, unused tax losses and unused tax credits [line items] | |||
| Deferred tax assets | $ 3,534,538 | $ 2,687,855 | $ 3,139,298 |
| Non-capital losses [member] | |||
| Disclosure of temporary difference, unused tax losses and unused tax credits [line items] | |||
| Deferred tax assets | 100,171,000 | ||
| Non-capital losses [member] | CANADA | |||
| Disclosure of temporary difference, unused tax losses and unused tax credits [line items] | |||
| Deferred tax assets | 100,171,000 | 100,660,000 | |
| Non-capital losses [member] | BRAZIL | |||
| Disclosure of temporary difference, unused tax losses and unused tax credits [line items] | |||
| Deferred tax assets | 0 | $ 0 | |
| Deductible temporary differences [member] | CANADA | |||
| Disclosure of temporary difference, unused tax losses and unused tax credits [line items] | |||
| Deferred tax assets | $ 4,574,448 | $ 2,520,440 |