Intangible asset (Tables) |
12 Months Ended |
|---|---|
Dec. 31, 2025 | |
| Intangible asset [Abstract] | |
| Reconciliation of carrying amount of intangible assets | 2025 2024 Cost Beginning of year $118,819 $118,819 End of year 118,819 118,819 Accumulated amortization Beginning of year 78,997 75,242 Amortization charge 3,660 3,755 End of year 82,657 78,997 Net book value at December 31 $36,162 $39,822 |