Intangible assets - Rollforward (Details) - USD ($) $ in Thousands |
12 Months Ended | |
|---|---|---|
Dec. 31, 2022 |
Dec. 31, 2021 |
|
| Reconciliation of Changes in Intangible assets [Roll Forward] | ||
| Beginning balance | $ 20,788 | $ 3,764 |
| Acquisition of intangible assets | 17,279 | |
| Additions to intangible assets | 550 | 1,543 |
| Amortization expense | (3,107) | (1,798) |
| Impairment on intangible assets (note 27) | (13,017) | 0 |
| Ending balance | 5,214 | 20,788 |
| Cost | ||
| Reconciliation of Changes in Intangible assets [Roll Forward] | ||
| Beginning balance | 78,677 | 59,855 |
| Acquisition of intangible assets | 17,279 | |
| Additions to intangible assets | 550 | 1,543 |
| Amortization expense | 0 | 0 |
| Impairment on intangible assets (note 27) | 0 | |
| Ending balance | 79,227 | 78,677 |
| Accumulated amortization | ||
| Reconciliation of Changes in Intangible assets [Roll Forward] | ||
| Beginning balance | (57,889) | (56,091) |
| Acquisition of intangible assets | 0 | |
| Additions to intangible assets | 0 | 0 |
| Amortization expense | 3,107 | 1,798 |
| Impairment on intangible assets (note 27) | (13,017) | |
| Ending balance | $ (74,013) | $ (57,889) |